Beautify, minify, and validate JSON instantly with syntax highlighting and clear line/column error messages — all in your browser, nothing uploaded or stored.
Paste or type your JSON below
Paste your JSON into the input box, upload a .json file, or click Load Example to try it out. Valid JSON is beautified automatically as you type, with color-coded keys, strings, numbers, and booleans.
Yes. This JSON formatter is completely free, has no sign-up, and no limit on how much JSON you can format.
No. Every format, minify, and validation check runs locally in your browser using JavaScript. Nothing is uploaded to a server or stored anywhere.
Format (beautify) adds line breaks and indentation so nested JSON is easy to read. Minify strips all unnecessary whitespace to produce the smallest possible file size, useful for production APIs and config files.
If your JSON is invalid, this tool shows the line and column where parsing failed and highlights that spot in the input box, so you can jump straight to the problem instead of scanning the whole file.
Yes. Turn on "Sort Keys" and every object's keys are sorted alphabetically (recursively) when the JSON is formatted or minified.
Yes. Click Upload File and choose a .json or .txt file from your device — its contents load straight into the input box.