JSON Formatter & Validator
Paste messy JSON and get it formatted, validated and beautified in milliseconds. Spot errors instantly and minify your data for production use.
AdvertisementAdSense slot placeholder — set ADSENSE_CLIENT in build.py
About the JSON Formatter & Validator
Paste messy JSON and get it formatted, validated and beautified in milliseconds. Spot errors instantly and minify your data for production use. It is completely free to use and works on any device — desktop, tablet or mobile — with no installation required.
Key features
- Instant formatting and validation
- Clear error messages with position hints
- Minify and copy with one click
How to use
- Paste your JSON into the input box.
- Click “Format” to beautify, or “Validate” to check for errors.
- Copy or download the result.
AdvertisementAdSense slot placeholder — set ADSENSE_CLIENT in build.py
Frequently Asked Questions
What does the JSON formatter do?
It turns compact or messy JSON into clean, indented, human-readable text and checks for syntax errors.
Is my JSON data uploaded anywhere?
No. All parsing and formatting happen locally in your browser.
Can I minify JSON too?
Yes. Use the Minify button to compress JSON to a single line for production.