Format & validateTHE SMALL TOOLS THAT MAKE A BIG DIFFERENCE
JSON Formatter.
A little structure goes a long way. Format, validate, and minify your JSON in an instant.
100% browser-based
Input
JSONOutput
JSONA clearer view, coming right up.
Your formatted JSON will appear here.
Hit “Format JSON” to get startedOnly your browser sees your data. 2 MB input limit.No uploads. No sign-up. Just tools.
A QUICK WALKTHROUGH
Good data, in three steps.
Simple by design. Ready when you are.
- 01
Bring your data
Paste your JSON, choose a local file, or try our example.
- 02
Make it yours
Choose an indentation size and select Format JSON. Use Minify for compact output or Validate to check syntax.
- 03
Keep things moving
Copy the result or download it as a .json file.
A few things under the hood
Know exactly how your data is handled.
JSON formatting & validation rules
- Accepts any JSON value: objects, arrays, strings, numbers, booleans, and null. A leading UTF-8 byte-order mark is ignored.
- Strict JSON only: double-quoted keys and strings, with no comments or trailing commas.
- Uses native JavaScript JSON semantics. Duplicate keys keep the last value; numbers beyond JavaScript precision may lose digits and numbers outside the finite numeric range are rejected. Keep large identifiers as strings.
- All tools accept UTF-8 text up to 2 MB and nesting up to 80 levels. Results are limited to 8 MB. CSV tables are limited to 1,000,000 cells including headers; XML is additionally limited to 50,000 elements. Results are held only in this page’s memory; refreshing or navigating away clears them.