Utility Tools
JSON Formatter & Validator
Format, validate, and minify JSON data
100% private. Your files and inputs never leave your device — everything runs locally in your browser.
How to Use JSON Formatter
Format, validate and compress JSON data. No signup, no uploads, no watermarks.
- 1
Paste your text, URL, or value into the input field.
- 2
Select the options you want to apply.
- 3
Run the tool to see results instantly.
- 4
Copy or download the output.
Why choose JSON Formatter?
- No uploads — your files never leave your device.
- Free forever with no signup, no watermarks, and no limits.
- Works on any device with a modern browser — no installs.
- Fast, private, and built for getting the job done in seconds.
Frequently Asked Questions
What does the JSON formatter do?▾
It pretty-prints, minifies, and validates JSON, with a tree view for browsing nested data.
How do I format JSON?▾
Paste your JSON into the editor and choose Format. Invalid JSON is flagged with the exact error location.
Is my JSON data uploaded?▾
No. All formatting and validation happens locally in your browser.