JSON Formatter
Format, validate and minify JSON instantly. Your data stays in your browser.
JSON input
0 characters · 0 linesFormatted result
0 charactersFormat and debug JSON faster
Paste JSON to turn compact or inconsistently spaced data into a readable structure. The validator identifies syntax errors, while configurable indentation makes the output suitable for code reviews, API debugging and documentation.
Privacy-first browser processing
The formatter uses the browser’s JSON parser. Input is not uploaded, which makes it suitable for ordinary development data. Avoid placing secrets in any online tool when organizational policy prohibits it.
Frequently asked questions
What does a JSON formatter do?
It parses JSON and rewrites it with consistent indentation so nested objects and arrays are easier to read.
Is my JSON uploaded?
No. Formatting and validation run locally in your browser.
What makes JSON invalid?
Common errors include trailing commas, single quotes, unquoted property names and missing brackets.
Can I minify JSON?
Yes. Minifying removes unnecessary whitespace without changing the represented data.
Can I sort object keys?
Yes. Enable object-key sorting before formatting. Array order is preserved.