JSON Formatter
Beautify, minify & validate JSON.
JSON Formatter at a glance
JSON Formatter is a free online developer tool you can use right now to beautify, minify & validate JSON — no account, no install and no usage limit. It runs entirely inside your browser, so whatever you enter stays on your own device.
- Price
- Free — no trial, no paid tier, no watermark
- Sign-up
- Not required
- Where it runs
- In your browser — nothing is uploaded to a server
- Works on
- Chrome, Safari, Firefox and Edge — desktop, tablet and phone
- Category
- Developer Tools
About JSON Formatter
The JSON Formatter beautifies, minifies and validates JSON right in your browser. Paste a messy or minified blob and get clean, indented, easy-to-read JSON — or collapse it back to a single line for production.
It's perfect for debugging API responses, tidying config files and confirming a payload is valid before you ship it. Nothing is uploaded, so even sensitive data stays on your machine.
How to use JSON Formatter
- Paste your code or text into the box.
- It's formatted and checked for errors automatically.
- Copy the clean, tidy result with one click.
Frequently asked questions
How do I format JSON online?
Paste your JSON into the box and it's instantly beautified with proper indentation. You can also minify it back to one line or validate it for errors.
Can this tool validate my JSON?
Yes. If your JSON has a syntax error, the formatter points it out so you can fix it before using the data.
Is my JSON kept private?
Completely. Formatting happens entirely in your browser — your JSON is never sent to or stored on any server.