JSON Formatter
Readable JSON in your browser, instantly.
200,000 users
Free
v1.0.0
Features
- Automatic JSON detection and formatting
- Syntax highlighting with a clean colour scheme
- Collapsible objects and arrays
- Toggle between formatted and raw views
- Clickable URLs inside JSON values
- Works entirely on-device — nothing is uploaded
Why you need it
Open a JSON API response in a browser and you get an unreadable wall of text. JSON Formatter fixes that automatically: every JSON document is detected, indented, syntax-highlighted, and made navigable with collapsible nodes — no copy-paste into an external tool required.
Private by design
Everything happens in your browser. The extension never sends the JSON you view to any server, so it is safe for internal APIs and authenticated responses.
Prefer a one-off?
If you just need to tidy a single payload without installing anything, use our web tool:
JSON Formatter & Beautifier
Open tool
Format, beautify and validate JSON instantly. Get the exact line and column of any error, duplicate-key warnings, and a full structure breakdown — all in your browser.
Get JSON Formatter
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