JSON Formatter
Format, validate and minify JSON instantly. Pretty-print with 2 or 4 spaces or tabs, optionally sort keys alphabetically, and get a clear error message when the JSON is invalid.
Input
Output
Formatted JSON
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Guides
What does this JSON formatter do?
It takes raw, cramped or messy JSON and turns it into cleanly indented, syntax-highlighted output — or the opposite: a minified single line ready for production. Every run also validates the input; if the JSON is broken you get the parser's exact error message instead of silent failure.
Features
- Pretty-print with 2 spaces, 4 spaces or tabs — or minify.
- Sort keys alphabetically (recursively) for stable diffs and easier comparison.
- Live validation with precise error messages as you type.
- Copy the result or download it as a
.jsonfile.
How to use it
- Paste JSON into the input box — formatting happens instantly.
- Choose your indentation style, or Minified to compress.
- Tick Sort keys if you want a canonical, diff-friendly ordering.
Privacy
Parsing and formatting run entirely in your browser. Your data never leaves your device — safe for API responses and configs you'd rather not paste into a random website's server.
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