Data Sources & Updates
BrowserTools combines local calculations with a small number of live information services. A calculation can be correct while an input is old. Check the source, relevant date, units and assumptions before acting on a result.
Inflation data was refreshed September 22, 2026. RDAP, loudness, color-bar and accessibility references were added September 18, 2026. HTTP and astronomy references were added September 14, 2026; the broader data-source review below was updated September 7, 2026. These dates do not mean every tool or external record was reviewed at the same time.
Domain Registration Intelligence
RDAP & WHOIS Domain Intelligence requests current public records through rdap.org and the registry or registrar service it discovers. RDAP is the structured successor to legacy WHOIS for gTLD registration data. Records can be redacted, incomplete or differently formatted and are not proof of ownership, identity, availability or reputation.
ICANN RDAP information ↗Audio Loudness References
Podcast Loudness & LUFS Studio offers editable planning targets informed by common publishing practices and the EBU -23 LUFS recommendation. Its browser meter is explicitly a fast estimate and does not implement the full standards-compliant K-weighting, gating and true-peak measurement chain.
EBU R 128 ↗Color Bar Signal Reference
AV Bars & Tone Studio uses recognizable SMPTE-style and EBU-style setup patterns plus practical PLUGE, grayscale and grid frames. The software output is a setup and identification aid, not a certified broadcast signal generator.
ITU-R BT.471 ↗Website Accessibility
The Website Accessibility Audit Workspace maps a bounded set of static-source checks to common accessibility requirements. Automated results cannot establish WCAG conformance and must be paired with rendered, keyboard, zoom, contrast, assistive-technology and human review.
W3C Web Content Accessibility Guidelines 2.2 ↗HTTP Status Codes
The reference and comparison workspace uses a September 14, 2026 snapshot of registered codes. Temporary, unused and obsolete entries retain their labels. Consult the linked registry for changes after that date.
IANA HTTP Status Code Registry ↗Sunlight and Lunar Illumination
Calculated locally from the chosen coordinates, date and observer height. The selected IANA time zone handles displayed clock times and daylight saving. These astronomical estimates are not weather forecasts; terrain and actual atmospheric conditions can shift observed events. Polar days without a rise or set are explicitly labeled.
SunCalc 2.0.2 ↗Currency Exchange
Requests rates when the base currency changes. The tool shows the provider’s update date. Reference rates may differ from a bank’s quote, spread or fee.
ExchangeRate-API; Frankfurter fallback ↗Crypto Prices and Conversion
Requests prices approximately every minute while open. If the provider is unavailable, cached prices are explicitly labeled with their age. Prices are indicative, not executable quotes.
CoinGecko ↗Fantasy Start/Sit and Lineup Planning
Requests the selected week’s projections, available results and injury tags. Responses are cached for up to 15 minutes. Refresh before kickoff and check official team inactive lists. A missing injury tag does not confirm health; missing weather does not confirm safe conditions. Scores are heuristics, not calibrated probabilities.
Sleeper and ESPN ↗Production Weather
A forecast is requested for the selected place and date. Check the saved forecast time and refresh when a shoot approaches. Forecast range, coverage and third-party availability limit the result.
Open-Meteo ↗AI Pricing and Context Limits
The community feed is cached for up to 24 hours. Historical examples are labeled when the feed is unavailable. Confirm current model availability, token billing, caching discounts and regional pricing with the provider; custom prices are editable.
LiteLLM community reference ↗U.S. Inflation
Published annual-average CPI-U is included through 2025. The selectable 2026 value is a clearly labeled provisional January–August average of 331.655, calculated from the eight published monthly CPI-U values and checked September 22, 2026. It will change as later months are released; older historical values are rounded.
Bureau of Labor Statistics ↗Lottery Tax Estimates
Federal brackets are updated to 2026. State presets are historical approximations, with an editable rate for current information. Residency, ticket location, other income, deductions and local taxes can change the answer.
IRS tax-year 2026 adjustments ↗Slang and Fantasy Names
Name suggestions and built-in definitions are editorial snapshots, not a real-time popularity ranking. Optional slang results come from a community source and may contain mature or inaccurate material. Team and player associations can change.
Curated word banks; optional Urban Dictionary lookup ↗Rates, Rules and Reference Tables
Mortgage rates, investment returns, tuition, compensation, tax percentages, mileage reimbursement and equipment costs generally come from the values you enter. Presets illustrate a scenario; they are not current offers. Health equations and electrical or engineering references are planning aids with a defined scope, not personalized advice or a certification of compliance. Confirm the applicable jurisdiction, standard edition, manufacturer specification and professional requirements.
How We Handle Corrections
If an external service fails, review its error or cached-data notice. If you find an incorrect value, send a correction with the tool link, the source, the date the information applies and a reproducible example. We can then update the specific dataset and test the calculation. We do not change review dates merely to make a page look newer.