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Inspect and format JSONL in your browser

Useful for reading, formatting, and debugging JSON Lines data in logs, exports, API traces, and analytics events.

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Runs in the browser Updated 2026-04-13
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Overview

JSONL Viewer helps you open, format, and inspect .jsonl files directly in the browser without setting up a local parsing workflow.

Processing stays in the browser, which makes it useful for debugging exports, logs, traces, and other JSON Lines files that may contain sensitive data.

Why Use It

  • Open a JSONL file or paste raw JSON Lines text
  • Review records line by line to locate malformed or unexpected entries
  • Good fit for export validation, log debugging, and event analysis
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FAQ

How is JSONL different from JSON?

JSONL stores one JSON record per line, which makes it easier to stream, append, and process logs or batch exports.

What is this tool best for?

It is useful for checking API logs, analytics events, batch exports, and any dataset stored in JSON Lines format.