JSON Formatter
Format, beautify and validate JSON online, or minify it in one click. View data in a collapsible tree, fix errors highlighted by line and column, then copy or download — all in your browser.
- Free
- Online
- No limits
- Secure
Your files are processed locally in your browser and never uploaded.
Free online JSON formatter, viewer and validator
Paste or upload your JSON and instantly beautify, validate or minify it. This free online JSON formatter pretty-prints messy data with clean indentation, highlights syntax errors with the exact line and column, and lets you explore large files in a collapsible tree view. Everything runs locally in your browser, so your data is never uploaded to a server — it stays private and works even offline.
How to format JSON online
- 1
Paste or upload your JSON
Copy your JSON into the editor, or click Upload to load a .json file from your device. You can also load a sample to try the tool right away.
- 2
Beautify, validate or minify
Pick your indentation (2, 3, 4 spaces or tabs) and click Beautify to pretty-print, Minify to compress it to a single line, or Validate to check that the JSON is correct. Any error is shown with its exact line and column so you can fix it fast.
- 3
Explore, copy or download
Switch to the tree view to browse nested data, expand or collapse everything, search for keys and copy any value. When you're happy, copy the result or download it as a .json file.
What you can do with this JSON tool
- Beautify and pretty-print JSON with 2, 3, 4 spaces or tab indentation
- Minify JSON to the smallest possible size for APIs and storage
- Validate JSON and jump straight to the error line and column
- Browse large data in an interactive, collapsible tree view
- Search keys, sort keys alphabetically and copy any value in one click
- 100% free, no sign-up, no upload — your data never leaves your browser
Why use JSON Formatter?
Easy to use
JSON Formatter was built to be as simple as possible. Add your file, get your result — there's no learning curve.
No installation
It runs right in your web browser. There is nothing to download or install on your device.
100% free
Use JSON Formatter as much as you want, completely free — no account and no hidden fees.
Works everywhere
Windows, macOS, Linux, Android or iOS — if you have a browser, it simply works.
Privacy first
We respect your data. Your files are handled with privacy in mind and never kept longer than needed.
Fast & no limits
There are no artificial limits. Process your files quickly, as many times as you need.
Questions and answers
Is JSON Formatter free to use?
Yes. JSON Formatter is completely free, with no limits and no sign-up required.
Do I need to install any software?
No. JSON Formatter works directly in your web browser, on any device.
Are my files safe?
Yes. Your files are processed locally in your browser and are never uploaded to any server.
Which devices and browsers are supported?
JSON Formatter works on all modern browsers and operating systems, including Windows, macOS, Linux, Android and iOS.
Is there a limit on how many files I can use?
No. You can use JSON Formatter as many times as you like, for free.
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