Developer Tools

JSON Formatter & Validator

A developer-friendly JSON tool to pretty-print, validate, minify, search, and parse JSON data with exact syntax error locations.

Your JSON code stays 100% inside your browser session.

Indent:

✓ Valid JSON

Formatted: 417 BMinified: 333 BWhitespace Saved: 84 B (20.1%)

Why use ZapPebble JSON Formatter & Validator?

Zero network latency. Everything is processed directly in your browser with optimized Web APIs.

Your files and sensitive information never leave your computer. No cloud storage, no leaks.

No mandatory signup, no credit cards, and no artificial daily limits. Use freely anytime.

Paste your raw JSON string or upload a .json file directly into the editor.

Click Format (2 or 4 spaces) or Minify. Validation runs live and reports exact error positions.

Copy formatted output to clipboard with one click or download as a .json file.

Yes. Processing runs completely in your local browser window. ZapPebble does not transmit your JSON payload to any server.

Chrome Extension Available

Get instant 1-click access to JSON Formatter & Validator and 7 other free utilities without opening a new tab.

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