JSON formatter
Format, validate and minify JSON.
Paste your JSON.
Available in: 
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JSON formatter: what it is for
The JSON formatter organizes any JSON with indentation, points out syntax errors with the exact line and also minifies it to save space.
Since it runs in the browser, you can paste sensitive API data without sending it to anyone.
How to use
- Paste the JSON.
- Choose format or minify.
- Copy the result or fix the error shown.
When to use it
- Reading API responses.
- Validating configuration files.
- Reducing JSON size.
Frequently asked questions
Is the JSON sent to a server?
No. Formatting happens in your browser, so you can paste sensitive data.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.