JSON Formatter
Validate · beautify · minify — offline
Output
Waiting for input…
—
Total keys
—
Max depth
—
Size
Privacy for API secrets
API responses often contain tokens or customer data. Everything here runs in your browser — nothing is transmitted, so production payloads stay private.
Related tools
Common JSON errors this catches
- Trailing commas:
{"a": 1,}— invalid JSON (fine in JS objects). - Single quotes:
{'a': 1}— JSON requires double quotes. - Unquoted keys:
{a: 1}— keys must be in double quotes. - Comments:
// note— the JSON spec allows none.
Error lines: when validation fails, the status shows the parser's error position so you can jump straight to the problem.