JSON Formatter & Validator

Format, minify and validate JSON with clear error feedback and downloadable output. Free to use online with no sign-up. Fast and mobile-friendly.

Paste JSON to check whether it is valid, pretty-print it with your preferred indentation or minify it for compact storage and transfer.

Example

Paste {"free":true,"tools":69} and format it into readable indented JSON.

Frequently asked questions

Does this modify JSON values?: Formatting changes whitespace only. Minifying also removes unnecessary whitespace while preserving the parsed JSON data.
Can I download the result?: Yes. Valid formatted or minified JSON can be downloaded as a .json file.