{ }
JSON Formatter
Format, validate and minify JSON data with syntax highlighting.
Input
About this tool
Format, validate and minify JSON data with syntax highlighting. Your data never leaves your browser. Client-side processing with zero waiting. No accounts, no paywalls, no watermarks.
How to use
- 1
Type or paste your data in the input box
- 2
Choose your options and run the tool
- 3
Copy or download the result — done!
Frequently asked questions
▸What happens if my JSON is invalid?
You'll see the exact line and column of the syntax error, so you can jump straight to the problem and fix it in seconds.
▸Is my JSON sent to a server?
Never. Parsing, formatting and validating all happen locally in your browser, so API responses with real data stay private.
▸How large a file can it handle?
Files of a few megabytes format fine. If it feels slow, use the minify option — it strips spaces and shrinks the output too.