Readable JSON in one click
Validate, format and minify JSON locally with clear parse-error messages.
Method
The input is parsed using the browser JSON parser and re-serialized with either two-space indentation or no extra whitespace.
{"active":true,"count":3} becomes a consistently indented, multi-line document.
Use responsibly
JSON does not allow comments, trailing commas, NaN or undefined. Very large files may slow the browser.
Input is not uploaded or logged. No file contents or calculation inputs are sent to our analytics system.
Last reviewed: 20 July 2026
Calculation and copy checked for this release.
