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Format and beautify JSON data with syntax highlighting, validation, and minification options.
A JSON beautifier turns compact, single-line JSON into a neatly indented, readable document — and can just as easily minify it back into the smallest possible payload. Paste an API response, a configuration file, or any JSON blob and the tool reformats it with your chosen indentation so nested objects and arrays are easy to scan.
Everything runs locally in your browser. The JSON you paste is validated as you type and formatted on your device — nothing is uploaded, logged, or stored — so you can safely work with sensitive payloads. A status badge tells you immediately whether the input is valid, and if it is not, you get the error message along with the line and column where parsing failed.
Beyond formatting, you can sort object keys alphabetically to make two documents easier to diff, or switch to minify mode to strip all whitespace for production use. Choose between 2-space, 4-space, or tab indentation to match your project's style, then copy the result with a single click.
No. Validation and formatting run entirely in your browser using JavaScript, so the JSON you paste never leaves your device.
The status badge shows Invalid JSON and an error message appears with the line and column where parsing failed, so you can find and fix the problem quickly.
It reorders the keys of every object alphabetically. This produces a stable, canonical layout that makes two JSON documents much easier to compare in a diff.
Beautifying adds indentation and line breaks for readability, while minifying removes all unnecessary whitespace to make the smallest possible payload for transmission or storage.
No. Beautifying and minifying only change whitespace. The keys, values, and structure of your JSON remain exactly the same.