JSON Formatter
Beautify, validate and pretty-print JSON online. Free, fast and works entirely in your browser.
How to use JSON Formatter
- 1Paste your JSON into the input box.
- 2Choose indent size (2 or 4 spaces).
- 3Click Format to get clean, indented JSON.
- 4Copy or download the result.
Frequently asked questions
What does a JSON formatter do?
It re-indents and validates JSON so it's easy to read and share. Invalid JSON is flagged with the exact error location.
Is the JSON Formatter really free?
Yes — every tool on ToolFlexPro is 100% free with no signup, no watermarks and no daily limits.
Is my data safe?
Everything runs directly in your browser. Nothing is uploaded to a server, so your data stays private on your device.
Does it work on mobile?
Yes. ToolFlexPro is fully responsive and works on any phone, tablet or desktop.
Do I need to install anything?
No installs. It runs instantly in any modern browser (Chrome, Safari, Firefox, Edge, Brave).