JSON Formatter & Validator — Beautify, Validate & Fix JSON Syntax
Format, beautify, and validate JSON payloads with clear syntax error highlighting and tree views.
Local processing
No server uploads
Runs on your device
No file uploads
Fast results
No server wait
Works on your devices
Phone, tablet and desktop
Private by design
Your data stays local
How to use JSON Formatter & Validator
Paste valid JSON, choose an indentation level and select Format & Validate, or choose Minify to remove whitespace. Syntax errors are reported when parsing fails.
Privacy & local processing
All data stays in your browser and is never saved or transmitted.