All Tools

Build a .gitignore from common stacks and environments like Node, Python and macOS.

Create reviewed host-scoped Apache redirect snippets with path preservation and temporary or permanent responses.

Roll mixed polyhedral dice in a Three.js tray, with advantage, keep rules, percentile dice and roll history.

Convert STL and OBJ meshes, remove common facet defects, normalize winding and export STL, OBJ or GLB locally.

Resize model dimensions between scale ratios and calculate the exact slicer percentage, area change and volume change.

Estimate filament, electricity, machine time and a customer quote from real slicer and spool details.

Project your 401(k) balance at retirement, including your employer's matching contributions.

Plan the sample needed per variant, then analyze conversion-rate uplift, p-value and statistical significance.

Calculate acceleration from initial velocity, final velocity and elapsed time with common speed and time units.

Convert acceleration among m/s², ft/s², standard gravity, Gal and speed-change units with an auditable SI base.

Turn impressions, clicks, spend and conversions into CTR, CPC, CPM, conversion rate, CPA and ROAS at once.

Add sequential line numbers to text or remove an existing numbered prefix, with custom separators and zero-padding.

Move a calendar date by years, months, weeks and days with reliable end-of-month handling.

Stamp page numbers onto every page of a PDF — choose the position, format and starting number, all in your browser.

Full tournament builder — single & double elimination, round robin, blank printable brackets, PDF export, double-sided March Madness layout and 6 themes.

Batch-convert images or PDF pages with brightness, color filters, grayscale, blur, sharpening and image borders—all processed locally.

Encrypt text locally with AES-256-GCM and password-based keys; export a portable encrypted message.

Generate aesthetic, vaporwave and cursive Unicode text styles.

Calculate age or the exact difference between two dates in years, months, weeks, days, hours, minutes and seconds.

Review pasted code for likely bugs, edge cases and test ideas without executing it.

Adapt one source into platform-specific posts, video hooks and podcast show notes.

Group supplied feedback into evidence-backed themes, pain points and follow-up opportunities.

Draft new emails and context-aware replies with subject options and clear next steps.

Enhance small images with genuine local Swin2SR super-resolution, compare before and after, and download PNG, JPEG or WebP.

Organize pasted meeting notes into decisions, action items, unresolved questions and follow-up drafts.

Turn verified product details into storefront copy, feature bullets and buyer FAQs.

Build well-structured prompts for Claude, ChatGPT or Gemini with the Role–Task–Context–Format method.

Compare your experience with a job description and improve honest, evidence-backed application materials.

Transform process notes into an editable procedure with roles, checkpoints and exceptions.

Create source-grounded study guides, practice questions and flashcards from your notes.

Turn supplied articles and notes into clear summaries, key facts and open questions.

Estimate how many tokens your text uses and whether it fits Claude, GPT or Gemini context windows.

Turn a product brief into scoped user stories, acceptance criteria and open questions.

Revise grammar, clarity and tone while preserving meaning, with an explanation of changes.

Practice target acquisition with adjustable target sizes, hit timing, miss counts, accuracy and downloadable results.

Compare one bag against multiple editable airline and fare limits, including rotated dimensions, linear size and weight.

See a full month-by-month (or yearly) loan payoff schedule with principal, interest and balance.

Find exact English dictionary anagrams or enumerate unique letter arrangements with duplicate-letter handling.

Convert degrees, radians, gradians, turns, arcminutes, arcseconds and NATO mils from an exact radian base.

Design gradient, shimmer, typewriter, rotating, morphing, reveal and staggered text effects, then export production-ready CSS, HTML, React code or PNG.

Convert a quoted rate plus lender fees into the true annual percentage rate of a loan.

See how much a savings account or CD grows at a given APY over time.

Open ZIP, TAR, TAR.GZ, TGZ and GZ archives locally, inspect their files and download one entry or repack everything as ZIP.

Convert metric, US customary, land and survey-scale area units with exact factors.

Convert text to ASCII character codes and back — decimal, hexadecimal or octal — instantly and entirely in your browser.

Calculate dimensions, compare contain or crop framing, animate between formats and export a production resolution ladder.

View a precise device-clock display for UTC, local time and major world zones with milliseconds, ISO time, Unix time and a truthful NIST-F4 reference.

Compare an honest resume with a job description using transparent keyword, phrase, structure and measurable-evidence coverage—without fake hiring guarantees.

Estimate acoustic travel, electronic latency and the audio or video correction needed for lip sync and distributed sound alignment.

Control audio dynamics, makeup gain and the final peak ceiling with a measured local mastering workspace.

Convert audio between MP3, WAV, M4A/AAC, OGG, Opus, FLAC and AIFF — entirely in your browser, nothing uploaded.

Plan PCM storage, Dante/AES67-style network fabrics, packet flows, wavelength and preliminary room-mode behavior in one engineering desk.

Arrange, gain-stage, crossfade and combine browser-decodable audio clips into one local WAV and cue sheet.

Change audio tempo and musical pitch independently or use linked tape-style varispeed, then audition and export a local WAV.

Trim audio, remove long pauses with adjustable silence detection, preview edits, apply fades and export WAV audio with edit records.

Estimate your car payment from price, down payment, trade-in, sales tax, rate and term.

Generate broadcast-style color bars, grayscale, PLUGE, grid and full-field signals with level-controlled digital reference tones, fullscreen, pop-out and local exports.

Build a mixed cable schedule, compare material-specific pathway sizes, enforce future reserve and screen three-cable jam geometry.

Generate CIDR-safe IPv4 device schedules that exclude gateway and reserved ranges, flag conflicts and document VLAN assignments.

Compare common rack heights, drag equipment through interactive multi-rack elevations and verify RU, depth, weight, power, thermal, airflow and feed limits.

Convert an equipment schedule and room loads into altitude-corrected sensible cooling, airflow, heat density and N+1 checks.

Size UPS VA, watts and ideal battery energy from a load schedule, then test N, N+1, 2N or 2N+1 failure scenarios.

Model video-flow bandwidth, compression, network overhead, redundancy and switch-fabric headroom for AV-over-IP designs.

Discover boy, girl and unisex baby names from a huge curated list — draw a single name or a whole shortlist, filter by first letter and length, and save your favorites.

Estimate blood alcohol content from drinks, weight and time — with clear safety warnings.

Scale a recipe between round and rectangular pans using pan area, depth, volume and an exact ingredient multiplier.

Generate Code 128 and EAN-13 barcodes from text or numbers and download them as PNG or SVG.

Encode text to RFC 4648 Base32 and decode Base32 back to readable text.

Encode text to Base64 and decode Base64 back to readable text.

Preview bulk filenames with numbering, dates, case and replacement rules, catch collisions, then download renamed copies.

Size backup energy and amp-hour capacity from continuous load, runtime, inverter efficiency and reserve.

Estimate runtime from Ah or Wh capacity, voltage, load, efficiency and usable discharge depth.

Generate salted bcrypt password hashes and verify a password against an existing bcrypt hash, in your browser.

Estimate fermentation ABV from gravity readings or calculate a multi-component beverage blend with proof, attenuation, formulas and measurement limits.

Add, subtract, multiply, exponentiate and find GCD or LCM using exact integers far beyond normal calculator limits.

Generate large FIGlet-style ASCII art text.

Split a restaurant bill with tip and tax evenly, or by what each person ordered.

Convert text to binary and binary back to text.

Decode complete 8-bit binary bytes into UTF-8 text with strict input validation.

Run the game: no-repeat draws for 75-ball, 90-ball or any custom list, with a live call board and auto-call timer.

Design printable 75-ball cards, true 90-ball tickets and custom bingo sets with PDF and print layouts.

Inspect exact 8–64-bit logic, shifts, signed values and interactive binary words.

Calculate your Body Mass Index (BMI) in metric or imperial units and see your weight category.

Calculate measured and waste-adjusted board feet, linear feet and lumber cost from actual stock dimensions.

Run individual, team or cooperative score sheets for up to 12 players with templates, turn order, live standings, autosave and exports.

Estimate body-fat percentage with the U.S. Navy tape method, then derive fat mass and lean body mass from body weight.

Estimate body surface area in m² with the Mosteller formula from height and weight. Education/reference only.

Convert normal text into bold Unicode characters.

Price a fixed-rate bond from market yield and calculate current yield, yield to maturity sensitivity and duration.

Visually set each corner's CSS border-radius with a live preview.

Design CSS box-shadows with sliders and a live preview, then copy the code.

Translate English text to uncontracted Unicode Braille, decode it back and inspect the active dots in each cell.

Find how many units you must sell to cover costs, from fixed costs, price and variable cost per unit.

Estimate bricks by modular brick-and-joint size, net wall area, courses, waste and unit cost.

Inspect browser, display, device and connection capabilities in one private local report.

Convert text into circled bubble Unicode letters.

Count working days between dates or add and subtract workdays with custom weekends and excluded holidays.

Turn an income statement and balance sheet into a clear liquidity, leverage, profitability and efficiency analysis.

Build a launch budget, add contingency, model monthly burn and see how long your opening cash will last.

Estimate enterprise and equity value with DCF, market and adjusted-asset methods, explicit reconciliation, scenarios and sensitivity analysis.

Calculate customer acquisition cost, lifetime value, the LTV:CAC ratio and payback period.

Encrypt and decrypt text with a Caesar shift cipher.

A fast, simple online calculator with a big keypad, keyboard typing, percent, memory and a history of your answers.

Derivatives, integrals, limits, Taylor series and differential equations solved step by step, with every rule explained and a graph.

Create a clean printable monthly calendar with Sunday or Monday week starts, notes and PDF export.

Estimate your daily calorie needs (TDEE & BMR) and targets to lose, maintain or gain weight.

Estimate 30 activities by MET value or build a level-walking estimate from steps or distance, time, height and measured step length.

Build a recipe calorie ledger, divide the complete batch by its actual yield and calculate portion weight and calorie density.

Convert text and identifiers to camelCase.

Estimate detect, observe, recognize and identify distances from sensor resolution, field of view and optical zoom.

Solve capacitor charge, stored energy, AC reactance, RC timing and series or parallel networks in one electronics workbench.

Project a vehicle's resale-value range from editable age, mileage, condition and depreciation scenarios.

Model a consumer auto lease from adjusted capitalized cost, residual value, money factor, taxes, mileage and end fees.

Build an annual emissions ledger from transparent, versioned and editable home-energy and travel factors.

Train five card-counting systems in an organized live-shoe workspace with running-count, true-count and deck-estimation drills.

Exact hypergeometric odds of drawing your key cards — deck size, copies and draws in, a full exactly / at-least table out.

Model sealed-pack odds across loose packs, hobby boxes and cases for sports cards, Pokémon and other trading-card products.

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg and more in one click.

Calculate CD, money market and high-yield savings earnings — APY growth broken down by year.

Design print-ready certificates with polished templates, safe ID placement, image watermarks, direct custom seal artwork and SVG, PNG or PDF export.

Remove specific letters, numbers, symbols, punctuation or custom characters from text.

Create, edit, reorder, filter and export persistent local checklists and to-do lists.

Run two to six player clocks with Fischer increment, simple delay, Bronstein refund, face-to-face display and exportable move logs.

Predict a child's adult height from the parents' heights using the mid-parental method.

Build Unix and Linux file permissions visually and copy the matching octal chmod command.

Compose with diatonic, secondary-dominant and borrowed-chord maps, then arrange, audition, transpose, save and export the progression.

Build a printable weekly family chore chart — add kids and chores, click to assign days, auto-rotate fairly, add point values, then print a clean one-page chart to stick on the fridge.

Navigate major and minor keys, key signatures, diatonic harmony and functional relationships on an interactive harmonic wheel.

Build APA, MLA, Chicago and Harvard references and in-text citations for journals, books and websites.

Measure click speed in automatic timed sessions or use an open-ended manual click counter.

Estimate everything you'll pay at closing when buying a home — lender fees, title insurance, transfer taxes by state, prepaids and escrow — plus your total cash to close.

Estimate international top and pants sizes from an actual chest, bust or waist measurement, with clear brand-variation guidance.

Compare two text or code versions with a readable line-by-line added and removed view.

Build a repeatable coffee recipe by mass from water, coffee dose and brew ratio.

Flip a virtual coin for heads or tails, with a running tally.

Project inflation-adjusted education costs and the monthly savings needed after grants, existing funds and investment growth.

See how an image looks to people with protanopia, deuteranopia, tritanopia or full color blindness — check your designs for accessibility.

Check the WCAG contrast ratio between two colors and see AA/AAA pass or fail.

Convert colors between HEX, RGB, HSL, HSV and CMYK with a live preview — paste any hex, rgb() or hsl() value.

Blend colors in sRGB or linear light, generate ramps and explore all 148 CSS named colors.

Extract accurate photo, brand, screenshot or artwork palettes with contrast-aware swatches and professional exports.

Generate a palette of tints and shades from any base color, click to copy.

Pick a color from any visible desktop app, screen, window, monitor, screenshot or local image.

Separate standard and accelerated commission and combine it with base compensation.

See how savings or investments grow over time with compound interest and optional monthly contributions.

Shrink PDF file size by re-compressing pages — great for scanned documents.

Build a masonry takeoff from wall dimensions, openings, block face size, waste, mortar coverage and material prices.

Estimate ready-mix cubic yards and common dry-bag equivalents for rectangular slabs, circular slabs and round columns.

Calculate a two-sided normal confidence interval for a mean with a transparent formula trace.

Create a QR code that saves your name, phone, email and details straight to a phone's contacts.

Compose a CSP response header with directive controls, report-only mode and warnings for broad sources.

Build conventional commits with scopes, breaking-change notices and issue references.

Convert US, Imperial and metric kitchen volumes without confusing volume and ingredient mass.

Calculate Pearson and Spearman correlation from paired data with a scatter plot, tie-aware ranks, interpretation and PDF or CSV export.

Live countdown to Christmas, Halloween, Thanksgiving and more — or any date you pick — down to the second.

Set a custom hours/minutes/seconds timer or count down to a date — with a big display you can pop out into a resizable window and scale full-screen.

Estimate creatinine clearance / GFR with the Cockcroft-Gault equation from age, weight and serum creatinine. Education/reference only.

Build itemized brand-deal quotes, podcast inventory models and YouTube revenue plans with take-home estimates.

See how long it takes to clear a credit card balance, or the payment needed to pay it off by a date.

Explain any 5-field cron expression in plain English and preview its next run times.

Trim the margins off every page of a PDF by setting top, right, bottom and left amounts — all in your browser.

Convert between 100 cryptocurrencies and 12 fiat currencies with live, always-current rates.

Design a polished button with live hover, focus, active and disabled states, then export production-ready HTML and CSS.

Generate a fluid CSS clamp() value from minimum and maximum sizes and viewport widths, with a live preview.

Build production-ready polygon, inset, circle and ellipse masks with visual editing, transforms, live imagery and reusable project files.

Create reusable CSS variables with light/dark values, a live preview and editable JSON projects.

Beautify or minify CSS with custom indentation.

Create CSS linear gradients with a live preview and copy the code.

Build responsive grid and flex layouts with live previews, per-item sizing and clean HTML/CSS exports.

Compare selector specificity with modern pseudo-class support and readable ID/class/type scores.

Point a pure-CSS triangle any of 8 directions, size and color it, and copy the border-trick CSS with a live preview.

Clean CSV or TSV rows, normalize headers and text, remove blanks or duplicates, profile columns and export verified CSV, Excel or JSON reports.

Turn CSV or TSV data into a real .xlsx workbook in your browser — nothing uploads.

Convert CSV to JSON and JSON back to CSV with delimiter and header options.

Turn CSV data into a formatted Markdown table.

Turn CSV rows into clean, escaped XML with sanitized element names — headers optional, all in your browser.

Convert CSV rows into a YAML list keyed by your header row — quoted fields handled, nothing uploaded.

Convert recipe volumes and weights with ingredient-specific densities, US or metric cups, custom ingredients and batch scaling.

Convert between 40+ world currencies using live exchange rates that update daily.

Generate creepy, distorted cursed text with adjustable intensity.

Convert text into elegant cursive script Unicode.

Generate cute and pretty Unicode font styles.

Build an editable 5e character dossier with ability checks, skills, HP, session resources, spell slots, inventory, dice rolls and portable JSON or PDF sheets.

Convert between bytes, KB, MB, GB, TB and PB using binary units.

Add or subtract years, months, weeks and days from any date to find a future or past date.

Which day of the year a date is — ordinal day, days remaining, leap-year status and a year-progress bar.

Inspect a display with full-screen solid colors for dead, stuck, bright or uneven pixels.

Compare guaranteed interest savings with after-tax, risk-adjusted investment outcomes over the same time horizon.

List every debt, add your extra monthly payment and compare snowball and avalanche payoff plans month by month.

Calculate your debt-to-income (DTI) ratio from your monthly debt payments and gross income.

Estimate deck-board courses, stock boards, linear feet and face fasteners from actual board layout.

Remove unwanted pages from a PDF by number or range and download the cleaned file.

Solve density, mass or volume with laboratory and everyday units on one auditable worksheet.

Convert density across laboratory, material, metric and customary mass-per-volume units.

Roll virtual dice (d4–d100) with secure randomness and see the total.

Use phone orientation sensors to check relative tilt with a two-axis bubble, zero calibration, hold and adjustable tolerance.

Solve any term in M1V1 = M2V2 and turn the result into a stock aliquot and diluent preparation card.

Compare actual and dimensional shipping weight with an editable carrier divisor.

Size dvLED pixel pitch, module counts, canvas resolution and spares from dimensions and closest viewing distance.

Generate stylish fonts that work in Discord messages.

Find the sale price and how much you save from an original price and a percentage off.

Estimate required display luminance from room illumination, screen reflectance, contrast target and design margin.

Calculate required display dimensions, viewing angles and minimum character height for room geometry and content tasks.

Check horizontal and vertical image angles, off-axis viewing and screen elevation for near and far seats.

Open DMARC XML, GZIP or ZIP reports and inspect source volume, alignment and policy dispositions without uploading mail data.

Look up ten DNS record types, compare resolvers and export timestamped answers.

Convert text and identifiers to dot.case.

Convert text to double-struck blackboard-bold Unicode.

Calculate true baker's percentages with starter flour and water included, then adjust hydration and portion the finished dough.

Work out your home down payment and the loan amount from the price and a percentage down.

How long a file takes to download or upload at any connection speed — with the Mbps vs MB/s confusion sorted out for you.

Relate pixel dimensions, physical inches, diagonal size and horizontal or vertical density.

Estimate usable gas or EV range, reserve, condition loss, route margin, required capacity and likely refueling or charging stops.

Estimate 4-foot drywall sheets for room walls and an optional ceiling after openings and waste.

Plan reserved I/O, AEC and matrix capacity with explicit signal-stage gain and additive end-to-end latency assumptions.

Compare exact file content or flag similar photos, review groups, choose copies to keep and export a report or reviewed archive.

Delete repeated lines from text or code, with case and whitespace options.

Detect and highlight duplicate or overused words with counts.

Inspect CMX-style EDL events, reels, source and record durations with frame-rate checks.

Calculate effective DPI and preserve the same in-game sensitivity when changing mouse DPI.

Build an auditable service, dwelling or branch-circuit load schedule with explicit demand, duty, reserve and phase assumptions.

Convert W, kW, VA and kVA through power factor, then estimate current for DC, single-phase or balanced three-phase systems.

See what any appliance costs to run per day, month and year — with common presets.

Replace em dashes (and en dashes) with hyphens, commas, spaces or nothing.

Unfold raw email headers, map Received hops, summarize reported SPF/DKIM/DMARC, flag identity differences and export a private routing report.

Score an email subject line, preview it in a desktop and phone inbox, and catch spam-filter phrases before you hit send.

Set a risk-adjusted cash reserve from essential expenses, income stability, dependents, insurance and existing liquid savings.

Build a weekly staff schedule with drag-and-drop shifts — assign, move and reorder employees, track hours, then print or export CSV.

Run tabletop encounters with initiative order, round tracking, HP, conditions, GM notes and a player presentation view.

Convert joules, watt-hours, calories, BTU, foot-pounds and electronvolts with clear unit definitions.

Convert between .env files and JSON in both directions — handles quotes, comments and export prefixes.

Open DRM-free EPUB files locally, inspect their reading order, search every chapter, and create text or PDF reading copies.

Compare the after-tax present cost of leasing equipment with financing a purchase, including residual value and opportunity cost.

Build a professional itemized cost estimate with a validity date, live preview and real PDF, print, CSV or text export.

Estimate charging time, grid energy, session cost and range added from vehicle and charger specifications.

Open an .xlsx workbook locally, pick a sheet and export clean CSV with your choice of delimiter.

Convert a worksheet into JSON records keyed by its header row — parsed locally, never uploaded.

See the camera, exposure, date and GPS metadata hiding inside a photo — parsed locally, never uploaded.

Pull every email address out of any text or list, with options to dedupe and sort.

Pull selected pages out of a PDF into a new document — enter ranges like 1-3, 5, 8 — entirely in your browser.

Find and list every URL or link in a block of text, with dedupe and sort options.

Generate stylish Unicode fonts for Facebook posts and bios.

Divide a fixed total rent among unequal rooms so every roommate prefers their assigned room at its price.

Generate realistic fake names, emails, phones, addresses and more as CSV, JSON or a list.

Generate dozens of copy-paste Unicode font styles.

Randomize your fantasy football, baseball, basketball or any league's draft order — fair, crypto-random, with a snake-draft board and dramatic reveal.

Who should I start? Compare two or three NFL players head-to-head — weekly projections, recent form and injury status feed a clear start/sit verdict with an explainable model preference score. Refresh public data before lineup lock.

Enter your whole fantasy football roster and league setup — any slots (QB to superflex to IDP), any scoring — and get a Smart Score lineup that weighs projections, recent form, matchups, injuries and weather, with side-by-side player comparison. Free, no signup.

Generate funny, punny, cool or savage fantasy football team names for the 2026 NFL season. Pick any NFL team for player-based puns (Mahomies, Hurts Donut, CeeDee LaMar), paste your roster to build names around your players, or spin up a whole league name — thousands of crypto-random combos.

Generate Fantasy Football (NFL), Basketball (NBA), Baseball (MLB), Hockey (NHL), Soccer (Premier/MLS/EPL/La Liga), Golf (PGA) or Cricket team names — punny player names, funny, cool or savage trash-talk, filtered by team and era, from thousands of combos.

Run a persistent wall-clock fasting schedule with flexible targets, a completion chime and private local history.

Turn an image into favicons at every common size (16–512px) to download.

Wind chill, heat index and dew point — what the temperature really feels like.

Estimate fence sections, posts, pickets and rails while accounting for gates and spacing.

Convert a soil-test nutrient target and fertilizer grade into product pounds, full bags, applied N–P–K and cost.

Calculate SHA-256, SHA-384, SHA-512 or SHA-1 checksums from a local file or text.

Compress files and folders into a real ZIP archive locally, with safe paths, progress, size comparison and no upload.

Identify files across a broad standards-backed index, with detailed opening guidance for hundreds of common and specialist formats.

Verify a file's real type from its magic bytes — detects 32 signatures locally and flags renamed or mislabeled files.

Estimate real copy time across USB, Thunderbolt, internal drives, DAS, NAS, Ethernet, Wi-Fi and fiber by finding the slowest part of the complete path.

Build a production cost-code ledger with baseline, working budget, commitments, actuals, ETC, EFC, variance and department rollups.

Track income, expenses, accounts and category budgets, then build a customizable 50 / 30 / 20 plan with Excel, PDF, CSV and JSON export.

Find and replace text with case, whole-word and regular-expression options.

Estimate your financial-independence number, projected FIRE age and savings requirement with explicit real-return and withdrawal assumptions.

Bake visible page content into a new image-based PDF with selectable resolution and an explicit data-loss warning.

Estimate airborne and gate-to-gate time from airport coordinates, routing, wind and operations, with local arrival times.

Convert volumetric flow across liters, cubic meters, US and Imperial gallons and cubic feet.

Draw flowcharts and diagrams in your browser — drag-and-drop shapes, connect them with labeled arrows, style everything, or turn a text outline into a chart. Export to PNG, SVG or JSON. Free, no sign-up.

Generate Instagram bio, caption and story font styles.

Solve force, mass or acceleration using Newton's second law with unit-aware measurements.

Convert newtons, pound-force, kilogram-force, ounce-force, dynes and poundals without mixing mass and force.

Add, subtract, multiply and divide whole, mixed and improper fractions with exact simplification and worked steps.

Calculate sustainable hourly and day rates from take-home goals, costs, taxes and realistic billable capacity.

Convert hertz, metric frequency, RPM, BPM and angular frequency in radians per second.

Convert frequency to wavelength using an editable propagation speed or a common medium preset.

Work out what a road trip will cost in gas, per mile and per person.

Convert US MPG, Imperial MPG, L/100 km and kilometers per liter correctly.

How likely is the banner character in your planned pulls? Flat-rate odds with hard pity, plus pull counts for 50–99% confidence.

Inspect connected controllers, analog sticks, button pressure, axis peaks and configurable dead-zone previews.

Convert horizontal and vertical field of view across display aspect ratios with Hor+ or horizontal-preserving policies.

Match physical mouse travel across DPI and game rotation scales with an auditable cm-per-360 calibration.

Calculate your real-world MPG from miles driven and gallons used, with metric equivalents.

Estimate generator running and motor-starting capacity with editable headroom.

Convert latitude and longitude between decimal degrees, DMS and degrees/minutes. Validate batches, cross-check on a map and export CSV or GeoJSON.

Validate GeoJSON, summarize features and properties, preview geometry offline, and export clean minified or formatted files.

Convert animated GIFs into H.264 MP4 with repeat, speed, frame-rate, size, quality and transparency-background controls.

Convert text to Gothic, Fraktur and blackletter Unicode.

Calculate a credit-weighted GPA with 4.0, 4.33, 5.0 weighted or fully custom grade-point scales.

Inspect GPX distance, elevation and duration, trim private endpoints, simplify tracks, and export GPX, CSV or GeoJSON.

Calculate a weighted course grade and solve the score needed on remaining assignments or a final exam.

Graph functions, polar curves, parametric curves and points with sliders, roots, minimums, maximums, intersections and a table of values.

Beautify or minify GraphQL queries and schemas.

Convert area and compacted depth into cubic yards, supplier-adjusted tons and material cost.

Measure multi-stop great-circle routes, initial bearings and radius coverage on a world map. Add coordinates, reorder waypoints and export GeoJSON.

Create an editable categorized grocery plan from household size, trip length, shopping style and custom items.

Track multiple daily habits on a persistent monthly grid with custom colors, completion rates and CSV or PDF export.

Model exponential decay, remaining quantity, decayed quantity and the number of half-lives elapsed.

Inspect browser request timings, failed requests and byte sizes with a local waterfall and filtered reports.

Compute MD5/SHA hashes of text or a file and compare them against an expected hash to verify integrity.

Turn words or a sentence into ready-to-use hashtags for social media.

Score a headline out of 100 with word-balance bars, power and emotional word highlighting and clear checks — all rule-based, all local.

Convert iPhone HEIC/HEIF photos to JPG or PNG — many at once — privately in your browser.

Compare people, characters, photos and reference objects on one precise scale. Customize silhouettes and export beautiful charts.

Convert hexadecimal to readable text and text back to hex.

Project a high-yield savings balance month by month, compare reinvested and paid-out interest, and export a full growth ledger.

Sign a message with a secret key — HMAC-SHA-1/256/384/512 signatures in hex and Base64, computed locally with Web Crypto.

Add or subtract two durations and view clock, decimal-hour, minute and second totals.

Convert clock hours, minutes and seconds to decimal hours, or convert decimal hours back.

See how much house you can afford with the 28/36 rule, from income, debts and down payment.

Build reciprocal language and region alternate tags with x-default, validation, HTML and PDF export.

Paste or upload HTML or Markdown and download a paginated PDF, rendered privately in your browser.

Encode text to HTML entities (< & …) or decode entities back to plain text.

Beautify or minify HTML with custom indentation.

Convert HTML into clean Markdown.

Build browser and CDN cache policies with explicit freshness, revalidation and privacy settings.

Search registered HTTP status codes and compare response meanings with practical guidance.

Build a transparent preliminary cooling-load estimate from area and editable adjustment factors.

Inspect calendar files without importing them, search event records, review time zones and recurrence rules, and export CSV, JSON or PDF.

Solve pressure, volume, amount or temperature with explicit SI conversion and the ideal gas constant.

See your ideal body weight by four medical formulas plus the healthy BMI range.

Recognize scanned documents and images in eight languages, create searchable PDFs, and export editable TXT or DOCX locally.

Remove backgrounds locally from portraits and objects, refine masks with erase/restore brushes, and export transparent PNGs or batch ZIPs.

Compress JPG and WebP images to shrink file size with a quality slider — all on-device.

Convert PNG, JPG, WebP, GIF, BMP and more to PNG, JPG or WebP — batch, with a quality slider, all in your browser.

Crop an image to any size or aspect ratio with a draggable, resizable selection box.

Strip EXIF, GPS location and other hidden metadata from photos before you share them — privately, in your browser.

Resize images to exact dimensions in your browser, with optional aspect-ratio lock.

Rotate an image 90° at a time and flip it horizontally or vertically, then download it.

Cut an image into rectangular tiles, transparent triangle pairs or seeded interlocking jigsaw pieces, then export individual files, ZIP or PDF.

Convert an uploaded image into ASCII art with adjustable detail.

Convert an image to a Base64 data URI, and decode data URIs back to an image preview.

Convert JPG and PNG images into a single PDF, one image per page, in your browser.

Plan documentary impact strategy, audiences, stakeholders, actions, participant care, campaign budget, evidence and learning.

Convert dollars between any two years with real U.S. CPI data, or project inflation forward and backward at a flat rate.

Calculate Instagram or TikTok interactions against followers, reach, impressions or video views.

Estimate added R-value, layers, coverage, package count and material cost for an editable wall, floor or attic assembly.

Explore a real-time 3D solar system, click a body for a close camera view and inspect its slowly rotating textured model and astronomy data.

A fully interactive periodic table — color by category, electronegativity, density or melting point, drag a temperature slider to watch elements melt and boil, then click any element for its electron shells, isotopes and common compounds.

Catalog containers and assets, track rooms and status, then create printable QR labels and portable inventory reports.

Calculate economic order quantity, reorder point, safety stock context, order cadence and relevant annual inventory cost.

Measure inventory turns, days on hand, sales-to-inventory and GMROI from beginning and ending inventory.

Project recurring investments with expected return, fees, inflation and purchasing-power results.

Generate invisible blank Unicode characters you can copy with one click.

Build and preview a polished itemized invoice, drag line items into order, and export a real PDF, print copy, CSV or text summary.

Inspect IPv4 and IPv6 networks, usable ranges, masks, address counts and smaller subnet plans from CIDR notation.

Build IPv4-mapped, NAT64 and legacy 6to4 representations with custom /96 prefix support and clear usage notes.

Convert text into italic Unicode characters.

Calculate IV infusion drip rate in gtt/min and pump rate in mL/hr from volume, time and drop factor. Education/reference only.

Beautify or minify JavaScript with custom indentation.

Turn an itinerary into destination clocks and a conservative sleep-and-daylight adaptation schedule.

Convert JPG images to PNG, entirely in your browser.

Convert JPG images to efficient WebP, on-device.

Beautify, validate and minify JSON with clear parse errors.

Validate records line by line, filter data and export JSONL, a JSON array, CSV or a PDF report.

Generate RFC 6902 patches or apply six operation types to a copy of your JSON, with per-operation diagnostics.

Infer a readable Draft 2020-12 JSON Schema from representative example data locally.

Validate JSON locally against a clearly stated practical subset of JSON Schema.

Convert plain text into an escaped JSON string.

Compare JSON values by path while ignoring object key order and retaining type differences.

Generate TypeScript, Go, Python, Java, C#, Rust, Swift and Kotlin models from JSON with nested types and optional fields.

Convert a JSON array of objects into CSV with a custom delimiter.

Turn a JSON array into a formatted .xlsx workbook with columns built from the object keys.

Convert a JSON object into TOML configuration format.

Convert JSON objects and arrays into clean, indented XML.

Convert JSON to YAML and YAML back to JSON.

Convert an escaped/stringified JSON string back into readable JSON.

Parse, validate and explore JSON in a collapsible, color-coded tree view.

Query JSON with property paths, wildcards, recursive descent, unions and slices without script execution.

Decode a JSON Web Token to inspect its header, payload claims and expiry — without sending it anywhere.

Sign HS256 JWTs and verify their signatures locally with explicit algorithm and time-claim checks.

Convert text and identifiers to kebab-case.

Inspect live keyboard values, hardware codes, modifiers, location and repeat behavior.

Solve kinetic energy, mass or speed and expose the effect of the squared velocity term.

Plan seed weight, bag count, overage and cost from lawn area, application rate, waste and retail bag size.

Calculate series resistance, dissipation and a conservative resistor power rating for an LED string.

Convert length and distance — mm, cm, m, km, inches, feet, miles, nautical miles, light years and parsecs.

Field of view for any lens on 30+ sensors — ARRI, RED, Sony, Canon, Blackmagic, full frame, Micro Four Thirds, broadcast and CCTV — plus a reverse mode that finds the focal length you need.

Solve thin-lens focal length, object distance or image distance with magnification and a ray diagram.

Work out how much life insurance coverage your family actually needs with the DIME method.

Explore birth-date numerology with transparent steps, master-number options and a personal-year calendar.

Fit an ordinary least-squares line, inspect residuals and R², predict Y values and reveal the calculation steps.

Real-time price ticker for the top 100 cryptocurrencies — price, 24h and 7d change, market cap and 7-day charts.

Estimate what Claude, GPT or Gemini API usage will cost per call, per day and per month.

Estimate the monthly payment, total interest and total cost of any loan from the amount, rate and term.

Compare three fixed-rate loans by payment, interest, fees and total cost.

Read PDFs privately with thumbnails, synchronized page navigation, zoom, rotation and full-screen viewing.

Calculate a logarithm in any valid base with natural and common-log references.

Generate placeholder Lorem Ipsum text by paragraphs, sentences or words for mockups and designs.

Generate random numbers for Powerball, Mega Millions, SuperLotto, Pick 3, Pick 4 and more.

See what you'd actually take home from a jackpot — federal + state taxes, lump sum vs. 30-year annuity, year by year.

Enter two names and get your love compatibility score — just for fun!

Check zodiac love compatibility between two signs or birthdays, with real astrology rules behind the score.

Convert required linear footage into whole stock boards, purchased length and cost.

Normalize MAC addresses, inspect local and multicast flags, and derive modified EUI-64.

Turn your daily calories into protein, carb and fat gram targets for any diet style.

Merge CSV or XLSX recipient data into reusable templates, preview every record, and export private local batches.

Calculate gross profit, profit margin and markup from a product's cost and selling price.

Estimate normal-theory margin of error for a mean or survey proportion.

Tidy and normalize Markdown formatting.

Build Markdown tables in a spreadsheet-style grid with per-column alignment.

Convert Markdown into clean HTML — headings, lists, links, code, bold and more.

Reconcile editable Amazon FBA, eBay, Etsy, PayPal, Stripe and TikTok Shop fees against product costs, refunds, fulfillment and target profit.

Calculate with custom 1×1 through 8×8 square or rectangular matrices, including valid arithmetic, transpose, inverse, determinant and RREF.

Hash text to MD5, or reverse-look-up common MD5 hashes back to their original value.

Generate an MD5 message digest from any text.

Calculate mean arterial pressure from systolic and diastolic blood pressure. Education/reference only.

Weight-based dose calculator: total mg from mg/kg and patient weight, plus volume to draw from a concentration. Education/reference only.

Build a role-based meeting cost with payroll burden, preparation time, recurrence, participant hours and a live session counter.

Compare one meeting instant across organizer and participant time zones.

Add bold top and bottom captions to any image and download your meme — all in your browser.

Combine multiple PDF files into one, in any order — privately in your browser.

Generate SEO and Open Graph / Twitter meta tags for your web pages.

Practice with a precise browser metronome featuring tap tempo, subdivisions, time signatures, accents and multiple click sounds.

Check microphone input levels, device details and recording playback before a call, stream or production session.

Build a dated mileage claim using editable IRS or employer rates, repeated trips, tolls, parking and actual-expense comparison.

Convert between 12-hour, 24-hour and four-digit military time, including midnight, noon, pronunciation and optional zone letters.

Convert Overworld and Nether X/Z coordinates at the correct 8:1 ratio, with chunks and a copyable teleport command.

Flip text into mirrored, reversed characters.

Build deterministic JSON fixtures from typed fields, response envelopes, HTTP statuses and reusable seeds.

Compare Euclidean modulo with truncated language-style remainders, including negative dividends and divisors.

Parse nested chemical formulas and hydrates into an auditable element-by-element molar-mass and composition ledger.

Solve concentration, solute moles or final solution volume with explicit milliliter and liter handling.

Translate text to Morse code and Morse code back to text.

Estimate your monthly mortgage payment from home price, down payment, rate and term — plus taxes, insurance and HOA.

Compare two home prices, mortgage rates, down payments and loan terms side by side — including monthly, upfront and long-term costs.

Model recurring, delayed, annual and one-time principal payments against the exact years remaining on your mortgage.

Verify pointer position, mouse buttons, double-clicks and wheel input in one event console.

A packing shopping list from your home size — small, medium, large, wardrobe and dish boxes plus tape and paper.

Which rental truck fits your move — load size from home and furnishings, a 10% buffer, and trips needed.

Estimate cubic yards and retail bags from bed area, depth, waste, bag size and price.

Build a production music log with timing, usage, composers, publishers, rights notes and exports.

Explore scales, chords, intervals, keys and tempo in one visual workspace with instant local audio playback.

Remove every audio track, trim the range, resize and locally render a new silent WebM with an edit manifest.

Generate from an expanded word bank, build a visible shortlist and export ideas as Excel, DOCX, PDF or text.

Inspect letter values, expression, soul-urge and personality numbers with optional birth-date cycles.

Convert letters and numbers into the NATO phonetic alphabet (Alfa, Bravo, Charlie…).

Add up your assets and subtract your debts to calculate your total net worth.

Search the official IANA port registry by service, number or transport with local exports.

Connect documents, file metadata, text, JSON and your own AI provider. Preview local media and inspect every step.

Calculate net present value, internal rate of return and payback period from an investment and its cash flows.

Convert numbers to written English or turn written numbers back into digits, including decimals and negatives.

Convert signed whole numbers exactly between bases 2 through 36.

Extract signed numbers, decimals and scientific notation from text with optional deduplication.

Challenge digit recall with progressively longer numbers, adjustable presentation speed and private session history.

Detect transparent arithmetic, geometric or previous-two-term patterns and project up to twenty additional terms.

Sort numbers ascending or descending from comma, space or line-separated input.

Enter any two of voltage, current, resistance or power — get the other two instantly.

Estimate your 1RM from any set, with training percentages for programming.

Arm a local browser alarm for the next occurrence or selected repeat days.

Plan local dated events in a monthly calendar and export a standard ICS file.

A distraction-free browser notepad that autosaves locally on your device.

Capture a single photo or four-shot sequence with camera filters, countdown, mirrored framing, custom captions and PNG or print-PDF layouts.

Calibrate your display, measure between two markers and open a synchronized pop-out or true full-screen ruler.

Use the display as a full-screen steady, adjustable pulse or SOS light with brightness and white-balance presets.

Count sentences, words, characters and paragraphs, plus average words per sentence.

Record, review and download microphone audio entirely in the browser.

Explore API endpoints, methods, tags, parameters and responses from a local OpenAPI 3.x JSON document.

Convert Fahrenheit, Celsius, fan-assisted settings and UK gas marks, then build an adjustable oven-to-air-fryer time and temperature plan.

Separate regular, overtime and optional double-time hours with editable thresholds and multipliers.

Estimate your ovulation date, fertile window, next period and potential due date from your cycle.

Calculate exact tail probabilities, critical values and significance decisions for z, Student t, chi-square and F statistics.

Calculate running pace per mile and kilometer, plus speed, from your distance and time.

Generate a quantified trip checklist for business, leisure, adventure or beach travel, then add custom items and export PDF or text.

Estimate multi-coat wall and ceiling paint after standard door and window deductions, coverage, waste and cost.

A free online paint and drawing app — brushes, shapes, bucket fill, text, layers of undo, import a photo and export PNG or JPG. Runs entirely in your browser.

Compare ISO and North American paper dimensions and calculate exact raster pixels at a chosen DPI.

Convert text and identifiers to PascalCase.

Test how strong a password is and estimate how long it would take to crack — privately in your browser.

Create local QR codes for PayPal.Me, Venmo, Cash App, UPI, Zelle recipient details, Bitcoin or a provider-issued payment link.

Compare two PDFs page by page with synchronized previews, selectable-text similarity and PDF or CSV reports.

Reorder, rotate and remove PDF pages, then place text annotations and export a rebuilt PDF entirely in your browser.

See every metadata field hiding in a PDF — author, timestamps, software used — and download a scrubbed copy, all in your browser.

Burn confidential regions into rebuilt PDF pages with drag selection and coordinate controls.

Extract selectable PDF text into editable columns, adjust table boundaries, review statement data and export Excel, CSV or JSON.

Convert PDF pages to grayscale with preview, resolution controls and local processing.

Convert each page of a PDF into a high-resolution PNG image, in your browser.

Extract the text from a PDF document and copy or download it as plain text.

Extract selected PDF pages into a genuine editable DOCX file with paragraph reconstruction and explicit layout limitations.

Work out percentages: X% of Y, X as a percent of Y, and percent change between two numbers.

Compare two values symmetrically and see both directional percentage changes side by side.

Calculate nPr, nCr and factorials — ordered and unordered selections from n items.

Straighten photographed documents with draggable corners, clean up contrast, and export PNG, JPG or PDF.

Convert your dog's or cat's age into human years — size-adjusted, not the old times-7 myth.

Find the perfect name for a dog, cat, bird, fish, horse, rabbit, reptile or small pet — classic, cute, funny or full-on punny — from a giant name list.

Convert among pH, pOH, hydrogen ion concentration and hydroxide ion concentration with editable pKw.

Find out if your phone number spells anything — and turn words into dialable digits (1-800-FLOWERS style).

Prepare reader-friendly pronunciation copy with accent references, stress marks, custom names, cue layouts, listening and PDF export.

Arrange 2 to 30 photos in polished grids or mosaics with custom rows and columns, individual edits and image or PDF export.

Translate English text into Pig Latin while preserving punctuation and capitalization.

Create custom placeholder images of any size with your own colors and label.

Strip HTML, styles and fonts to convert rich text into clean plain text.

Convert PNG images to JPG with an optional background color.

Turn PNG images into real scalable SVG vectors by tracing them into colored paths — or embed the original pixels losslessly. Free, in-browser, no upload.

Convert PNG images to WebP while preserving transparency.

Estimate program loudness, sample peak, range and crest factor locally, compare podcast/streaming/broadcast targets and render a normalized WAV.

Budget class-allocated or measured device loads, cable loss, ports, switch capacity, heat and one-power-supply-failed operation.

Run focus sessions and breaks with configurable lengths, rounds, auto-start, chimes and a live page-title countdown.

Estimate gallons, liters and fill time for rectangular, oval and circular pools using average depth.

Control post stages, versioned delivery assets, timecode QC notes, checksums and 3-2-1 archive handoff in one local workspace.

Solve gravitational potential energy, mass or height with selectable local gravity.

Convert watts, kilowatts, horsepower, BTU per hour and other mechanical or thermal power units.

Estimate your pregnancy due date from your last period, plus how far along you are.

Convert Pa, kPa, bar, psi, atmospheres, Torr and mercury-column units, including tire-pressure guidance.

Check prime numbers, calculate prime factorizations, and find the GCF and LCM of a complete number set.

Calculate complements, independent intersections and unions, or conditional probability.

Run projects in one private workspace with multiple drag-and-drop boards, detailed task cards, filters, progress tracking and portable exports.

Time your work by project and task with one-click start and stop, daily and weekly reports, billable rates and CSV timesheets — private to this device.

Model an ideal projectile arc with launch speed, angle, height and selectable gravity.

Calculate projection geometry, lens coverage, screen area, foot-lamberts and nits with installation loss and screen gain.

Solve one missing value in a/b = c/d using exact cross multiplication.

Get a daily protein range in grams from body weight, training level and goal, with a per-meal split.

Create a professional purchase order with buyer/vendor details, reorderable items, totals and PDF, CSV or JSON export.

Convert pixels to rem and em (and back) for any root font size, with a quick reference table.

Create styled QR codes for URLs, text, email, SMS and calendar events, then export them for screen or print.

Scan and decode a QR code from an uploaded image or screenshot — right in your browser.

Solve real or complex roots, inspect the discriminant and vertex, and reveal every substitution step with Show Work.

Create a formal price quote with line items, a valid-until date, live preview and real PDF, print, CSV or text export.

Assign responsibility across tasks and roles, flag ownership gaps and export a clear project handoff.

Paste an entrant list, remove exact duplicates and draw one or more winners with a cryptographic shuffle.

Calculate usable NAS, DAS and server storage across RAID, RAIDZ and Synology SHR, including mixed drives, hot spares, overhead, used space and planned upgrades.

Pick one or more random winners from a list of choices.

Generate a random date between two dates in your chosen format.

Generate random IPv4 and IPv6 addresses for testing.

Generate random letters with vowel, consonant and custom-alphabet options.

Generate a random month as a full name or abbreviation.

Generate a random integer between your chosen minimum and maximum.

Generate random strings, tokens and API keys with custom length and character sets.

Randomly split a list of names into fair, balanced teams or groups.

Generate up to 100 unique words from a bundled 370,105-entry English corpus or focused common-word lists.

Simplify multi-part whole-number ratios and inspect their shared divisor and decimal relationships.

Look up current public domain registration data through RDAP, including lifecycle events, statuses, nameservers, DNSSEC and raw authoritative JSON.

Measure visual reaction time with randomized signals, early-click detection, median results and CSV session exports.

Count syllables and score text with Flesch Reading Ease, Flesch–Kincaid grade, Gunning Fog and SMOG.

Estimate a real estate agent's commission waterfall through side, referral, brokerage, franchise, team and expense deductions.

Recognize receipt or invoice images and PDFs locally, review detected vendor/date/totals and line items, then export CSV, Excel or JSON.

Issue a clean payment receipt with itemized lines, amount received and balance, plus real PDF, print, CSV or text export.

Model plan-level MRR, ARR, net new revenue, ARPU, logo churn, revenue churn and net revenue retention in one operating worksheet.

Compare your current loan to a refinance to see monthly savings and the break-even point.

Measure browser animation-frame timing and estimate the current display refresh rate.

Test regular expressions against sample text with live match highlighting.

Clean an email list by removing duplicate addresses, case-insensitively, one per line.

Collapse multiple spaces and tabs into one and trim each line, with an option to drop blank lines.

Remove line breaks and join lines with a space, comma or pipe — or keep line breaks and strip blank lines only.

Clean pasted text by stripping formatting, HTML, URLs, emojis, numbers and more.

Replace underscores with spaces and optionally capitalize each word.

Compare renting and owning across a chosen horizon with transaction costs, maintenance, taxes, appreciation and investment opportunity cost.

Calculate cash flow, NOI, cap rate, gross rental yield and cash-on-cash return in one operating statement.

Repeat text any number of times with a custom separator or numbering.

Quote resin prints from slicer volume, supports, vat waste, failure risk, machine time, labor, consumables and markup.

Decode four- and five-band resistor colors into nominal resistance, tolerance and range.

Generate WebP, JPEG and PNG width variants, strip metadata, package a manifest and create copy-ready picture/srcset markup locally.

Project your retirement savings from your age, contributions and expected return — plus estimated retirement income.

Stress-test retirement drawdown with inflation, fees, multiple return scenarios and a visible year-by-year balance path.

Reverse text by characters, words, letters-in-words or line order.

Track talent, locations, music, archive, artwork, brands, permits and supporting rights evidence through production and delivery.

Find the nearest US, UK, EU and Japanese ring size from inside diameter, circumference or a known US size.

Track owners, mitigation, review dates and residual risk with a priority queue and 5×5 heatmap.

Calculate return on ad spend, ROI and the break-even ROAS for your profit margin.

Build a robots.txt file to control crawlers, with sitemap and custom disallow rules.

Calculate return on investment (ROI), net profit and annualized return (CAGR) from an initial and final value.

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3999).

Convert dates and numbers to Roman numerals instantly.

Convert rise and run into angle, slope and pitch factor, then estimate gable-rafter length and roofing area.

Estimate waste-adjusted roofing squares, bundles, underlayment rolls and nails.

Arrange measured furniture footprints in a room with drag-and-drop, snapping, rotation, layout checks, undo and JSON, SVG, PNG or PDF exports.

Encode and decode text with the ROT13 substitution cipher.

Rotate every page of a PDF by 90, 180 or 270 degrees and download the result.

Project Roth IRA growth with a visible contribution-eligibility gate, shared IRA limits, fees, inflation and after-tax scenario comparisons.

Round to positive or negative decimal places using nearest, directed or truncation rules.

Generate RSA public and private PEM keys locally with 2048, 3072 or 4096-bit key sizes.

Estimate how long it takes an investment to double — or the return needed — using the Rule of 72.

Convert pay between hourly, daily, weekly, monthly and annual based on your hours and weeks worked.

Add sales tax to a price or work backwards to find the pre-tax amount and the tax included.

Estimate completed responses for a proportion with confidence, precision and finite-population correction.

Find out how much to save each month to reach a savings goal by a target date.

A free online scientific calculator: trig in degrees, radians or gradians, inverse and hyperbolic functions, logs, powers, roots, factorials, nCr, fractions, memory and history.

Convert decimal values into normalized scientific and engineering notation.

Record a screen, window or browser tab with optional microphone and shared audio, then preview and download the recording locally.

Track scene and take continuity, props, costume, screen direction and reference notes.

Beautify or minify SCSS with custom indentation.

Create a private gift exchange, manage exclusions and open an individual email draft for every participant.

Build local cryptographic passphrases from a large English or custom word list, then inspect entropy, strength and expected guess time.

Generate batches of cryptographic numeric PINs while filtering repeated-digit and simple sequential patterns.

Convert text to sentence case so each sentence starts with a capital letter.

Replay progressively longer tile patterns with configurable pacing, keyboard-accessible controls and session exports.

Draft a search result, compare desktop and mobile widths, inspect likely truncation and export the matching meta tags.

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text, computed securely in your browser.

Convert shoe sizes between US, UK and EU for men, women and kids — plus foot length.

Break down scenes, arrange a stripboard, plan shoot days and prepare selected-day call sheets and daily production actuals.

Build an editable Shopify profit bridge across refunds, COGS, payment and platform fees, fulfillment, shipping, apps and advertising.

Plan scenes and shots with reference frames, camera language, timing, status, reordering and production-ready exports.

Build a broadcast-style run of show — segments, talent, sources, durations and auto-calculated start times — with a live countdown mode and CSV, Excel and PDF export.

Draw, type or upload a signature, position it on a PDF page and export a flattened signed copy locally.

Draw a signature with your mouse or finger, or type one in script styles, and export a transparent PNG or SVG.

Round a value to a chosen number of significant figures while preserving precision notation.

Calculate simple interest and the total value from a principal, rate and time period.

Import Word, PDF, caption or text scripts, format selected passages with a rich toolbar, and run synchronized fullscreen or mirrored pop-out output.

Create and print a quick single-elimination tournament bracket with random or ordered seeding.

Audit robots.txt groups and sitemap XML locally, test paths, inventory URLs, find structural problems and export crawlability reports.

Translate or explain slang across 12 eras with intensity controls, searchable dictionaries, current Gen Z and Gen Alpha terms, and PDF export.

Add a slash-through effect to your text.

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Turn any text into a clean, SEO-friendly URL slug.

Convert text into small caps, superscript and subscript styles.

Inspect, offset, compare and convert SMPTE-style timecodes across common drop-frame and non-drop frame rates.

Convert text to snake_case or SCREAMING_SNAKE_CASE.

See how your link will look when shared on X, Facebook and LinkedIn — live card previews with your image, plus ready-to-paste meta tags.

Preview platform UI with your creator logo, compare placements, reframe creative, check important content and export guides or a CSV report.

Estimate measured and settlement-adjusted soil volume in cubic yards and retail bags.

Estimate array size, panel count and roof area from energy use, sun hours and system efficiency.

Analyze one or more audio files locally to estimate primary key, alternate key, Camelot code and BPM.

Sort words or lines A→Z or Z→A with case and duplicate options.

Design distributed coverage and target SPL, size amplifier channels, or build a preliminary surround-speaker coordinate and delay schedule.

Play short reference tones through left, right or both stereo channels.

Recommend speaker conductors and compare delivered power, or model RF/SDI coax attenuation and remaining link margin with mode-specific controls.

Learn a noise-only sample, reduce steady background noise, compare synchronized before/after playback and export WAV.

Convert speed — m/s, km/h, mph, feet per second, knots and Mach.

Enter options and spin a wheel to pick a random winner.

Extract specific pages or page ranges from a PDF, or split it into single-page files.

Match CSV or XLSX records by key, inspect changed cells, and export a precise reconciliation report.

Pack up to 100 frames with animation preview, edge extrusion, pivots, atlas diagnostics and implementation-ready image, metadata, PDF and ZIP exports.

Beautify or minify SQL with consistent keyword case and safe string-aware whitespace handling.

Turn CSV or TSV rows into escaped multi-row INSERT statements for PostgreSQL, MySQL, SQLite or SQL Server.

Open SQLite files, explore tables and views, run SQL locally, and export databases or query results.

Build a multi-room area schedule with shapes, cutouts, quantities, waste, material coverage, box counts and project cost.

Calculate real or imaginary square roots, simplify whole-number radicals and reveal the work step by step.

Create escaped SSML with speech rate, pitch, emphasis, pronunciation modes and pauses between lines.

Create stacked, vertical-style text.

Calculate riser count and height, treads, total run and geometric stringer length.

Get mean, median, mode, range, variance and standard deviation from a list of numbers.

Open binary or ASCII STL files locally, inspect mesh geometry and topology, measure the model and export an audit report.

Audit a user-balanced reaction, identify limiting reactants and excess material, and calculate theoretical and percent yields in grams or moles.

A precise online stopwatch with lap times, fastest/slowest highlighting, full-screen mode and a pop-out window that scales to any size.

The right bitrate and encoder settings for Twitch, YouTube or Kick — x264, NVENC, HEVC and AV1 compared, with a quality verdict and suggested OBS settings.

Add a strikethrough line through your text.

Generate secure random passwords using cryptographic randomness.

Generate Article, FAQ, Local Business, Product, Event and Breadcrumb JSON-LD in one maintained workspace.

Calculate student loan payments and see how much extra payments save in time and interest.

Allocate study time by deadline and difficulty, place recommended sessions on a monthly calendar and run focused blocks with the built-in timer.

Convert supported characters to subscript.

Preview, edit and style SRT/WebVTT captions over local video, inspect title-safe placement, export SRT and record a captioned WebM.

Transcribe audio or video locally, review editable cues, and convert captions to SRT, WebVTT, SBV or document formats.

Plan sunrise, sunset, twilight and golden-hour windows with moon illumination and calendar exports.

Convert supported characters to superscript.

Combine SVG icons into a reusable symbol sprite with safe local previews, editable IDs, HTML snippets and a portable manifest.

Optimize SVG source with precision controls, multipass processing and before/after byte counts.

Rasterise SVG files to PNG at a chosen scale.

Browse and copy arrows, stars, hearts, currency, math symbols and emoji with one click.

Solve linear systems with two to eight custom-named unknowns and distinguish unique, dependent and inconsistent results with elimination steps.

Estimate your net paycheck after taxes, FICA and pre-tax deductions from your gross salary.

Find your five training heart-rate zones with the Karvonen method.

A full prompting studio with run-of-show navigation, target-runtime pacing, optional cue stops, voice follow, recording and remote output.

Convert temperature between Celsius, Fahrenheit, Kelvin and Rankine.

Use the standard grading scale or customize bands, assessment weight, partial credit and rounding.

Compare two blocks of text or code and highlight added, removed and unchanged lines side by side.

Encode text as space-separated UTF-8 binary bytes and report byte and bit counts.

Split delimited text into columns and re-join with a new delimiter, or keep only chosen columns.

Type or paste text and have it read aloud in a natural voice — pick the voice, speed and pitch. Free and private.

Turn plain text, Markdown, CSV or log copy into an editable Word document with local DOCX and PDF export.

Wrap, pad or shorten text with exact widths, alignment and emoji-safe character handling.

Generate fonts for TikTok bios, captions and comments.

Estimate tiles and full boxes from net surface area, actual tile size, grout joint, waste, box count and cost.

Add or subtract hours, minutes and seconds, or find the duration between two dates and times.

Convert between seconds, minutes, hours, days, weeks, months and years instantly.