Code Lab · Bench
JSON Formatter
Beautify, minify and validate JSON
Input
Output
Your JSON is parsed locally in your browser. Nothing is sent anywhere.
About this bench
About JSON Formatter
Beautify, minify and validate JSON instantly. Paste your JSON to pretty-print it with proper indentation, collapse it to a single line, or catch syntax errors — all in your browser.
Input
Paste the code or structured data you want to inspect, format, convert or validate.
Result
A local validation, transformation or copy-ready result based on the selected options.
Limits
This bench does not execute or deploy your project. Validate generated output in the real target environment before production use.
How to use JSON Formatter
- 01Paste or type your JSON into the input above.
- 02Choose “Beautify” to format it or “Minify” to compress it.
- 03If the JSON is invalid, the error is highlighted so you can fix it.
- 04Copy the result with one click.
Frequently asked questions
Is my JSON sent to a server?
Nothing is uploaded. This tool runs entirely in your browser, so your data is processed on your own device and never sent to a server.
Is the JSON formatter free?
Yes — it is free with no sign-up, no watermark and no account-based quota. Your browser, device memory and the bench's stated file limits still determine how much it can process at once.
Can it detect invalid JSON?
Yes. The tool parses the input before beautifying or minifying it and reports a syntax error when the JSON is invalid.