Developer Tool
JSON Formatter & Validator
Free JSON formatter and validator. Beautify, minify, and fix JSON with instant error highlighting. Works offline and private.
JSON Formatter & Validator
Paste your JSON payload below to prettify, minify, and validate it instantly. 100% secure, processed entirely in your browser.
Input JSON
Output
Why Use Our JSON Formatter?
JSON is the standard data format for modern APIs and configuration. When responses arrive minified as one giant line, they become nearly impossible to understand. Our tool instantly beautifies JSON with proper indentation and structure.
Powerful Features
- One-click beautify and minify toggle
- Real-time syntax validation with clear error locations
- Collapsible tree view for large nested objects
- Copy to clipboard and download as .json file
Maximum Privacy
Everything runs 100% in your browser. Your API responses, tokens, and data are never sent anywhere — perfect for sensitive or production data.
Common Use Cases
- Debugging API responses from curl, Postman, or browser dev tools
- Cleaning minified JSON from logs and error reports
- Making configuration files human-readable before committing
- Validating structure before sending requests
Frequently Asked Questions
Is my JSON data sent anywhere?
No. All formatting and validation happens locally in your browser. Nothing is uploaded.
Can it fix broken JSON?
It can detect errors and show you exactly where the problem is. It does not auto-repair malformed JSON.