How to use the JSON Formatter & Validator
- Fill in the fields above.
- The result updates instantly in your browser — nothing is uploaded.
- Copy or download the output with one click.
About this tool
Beautify, minify and validate JSON with clear error messages. It is part of the Developer & Utility collection on URLMode — generators, encoders and handy everyday utilities.
Frequently asked questions
Is the JSON Formatter & Validator free?
Yes. The JSON Formatter & Validator on URLMode is 100% free to use, with no sign-up required.
Do I need to install anything?
No. It runs online in any modern browser on desktop, tablet or phone.
Is my data safe?
Yes. This tool runs entirely in your browser, so your input never leaves your device.