Free Tool
JSON Formatter & Beautifier
Paste your JSON and instantly beautify, validate or minify it. Runs entirely in your browser your data never leaves your device.
Instant Validation
Get immediate, clear error messages when your JSON has syntax issues pinpoints exactly what went wrong.
100% Private
All formatting happens locally in your browser. No data is sent to any server, ever.
Beautify & Minify
Toggle between human-readable indented format and compact minified format in one click.
What is a JSON Formatter?
A JSON formatter (also called a JSON beautifier or JSON prettifier) takes compact or unformatted JSON data and adds proper indentation and line breaks to make it human-readable. This is essential when working with API responses, configuration files, or debugging data structures.
Our tool also validates your JSON as you format it if your JSON has a missing bracket, extra comma, or incorrect syntax, you'll see a clear error message explaining what's wrong and where.