JSON Formatter

Beautify or minify JSON with syntax checks in the browser.

Paste JSON to beautify it with indentation or minify it into a compact string. The tool parses the input first — if the syntax is invalid, you get an error and the text stays unchanged.

Formatting and minification run locally in the browser. Strict JSON only: double-quoted keys and strings, no comments or trailing commas.

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FAQ

No. JSON is formatted locally in your browser. Your data never leaves your device.

No. Parsing, formatting, and minification are performed locally in the browser. The tool does not send the entered data to the server.