JSON Formatter & Validator - Beautify or Minify
Format, validate, and minify JSON data
How to Use JSON Formatter
Format, validate and compress JSON data No signup, and nothing gets uploaded for most use.
- 1
Paste your JSON into the editor.
- 2
The tool formats, indents, and validates it as you type.
- 3
See syntax errors highlighted with line and character positions.
- 4
Copy the formatted output or minify it for production use.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
What does the JSON formatter do?▾
It pretty-prints, minifies, and validates JSON, with a tree view for browsing nested data.
How do I format JSON?▾
Paste your JSON into the editor and choose Format. Invalid JSON is flagged with the exact error location.
Is my JSON data uploaded?▾
No. All formatting and validation happens locally in your browser.
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