What are the important limits?

Up to 20,000 lines and 5 MB. Blank lines are ignored and invalid lines are explicitly excluded from exports. This is not a streaming processor for multi-gigabyte files. CSV escapes spreadsheet formula-like values.

Where is my information stored?

Processing happens in your browser. These workspaces do not upload your inputs or send reports to a server. Session data is not automatically saved; download a project or report before closing. Keep sensitive exports private.

JSON Lines & NDJSON Explorer

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

Local Developer Workbench

JSON Lines · Inspect Records

Files are processed in this browser. No requests are sent to your endpoints.

JSON Lines Source

3 valid records · 0 invalid · 0 blank lines

Source Line	Record
1	{ "name": "Ada", "team": "Design", "active": true }
2	{ "name": "Sam", "team": "Engineering", "active": false }
3	{ "name": "Jo", "team": "Design", "active": true }

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One complete JSON value per line. Blank lines are ignored. CSV flattens top-level keys only; nested values stay JSON. Formula-like spreadsheet values are escaped. 20,000-line / 5 MB limit.

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What Is the JSON Lines & NDJSON Explorer?

Inspect newline-delimited JSON without losing original line numbers. Valid records, invalid lines and blank lines are counted separately. Filters search the serialized content of each record; the table paginates 50 records at a time.

How It Works

Open a JSONL/NDJSON file or paste one complete JSON value per line. Review any invalid-line diagnostics, enter a content filter, and export the matching valid records. CSV uses a union of top-level keys and keeps nested values serialized.

When to Use It

Use when inspecting local developer data or preparing configuration that needs review before production.

Frequently Asked Questions

How do I get started?: Open a JSONL/NDJSON file or paste one complete JSON value per line. Review any invalid-line diagnostics, enter a content filter, and export the matching valid records. CSV uses a union of top-level keys and keeps nested values serialized.
What are the important limits?: Up to 20,000 lines and 5 MB. Blank lines are ignored and invalid lines are explicitly excluded from exports. This is not a streaming processor for multi-gigabyte files. CSV escapes spreadsheet formula-like values.
Where is my information stored?: Processing happens in your browser. These workspaces do not upload your inputs or send reports to a server. Session data is not automatically saved; download a project or report before closing. Keep sensitive exports private.

Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.