JSON Formatter & Validator
Format, validate, and beautify JSON online. Tree view, syntax highlighting, and error detection — all in your browser.
Input
Output
Click Format or Minify to see the result
How to Use
- Paste your JSON string in the input area
- Click Format to beautify, or Minify to compress
- The tree view lets you explore complex JSON structures
- Copy the formatted output or download as .json file
Frequently Asked Questions
Can it fix invalid JSON?
Our validator will highlight exactly where the error is and what's wrong. You'll need to fix the source, but we make it easy to find the issue.
Is my JSON data safe?
Yes, all processing happens in your browser. Your data never leaves your device.