JSON Formatter & Validator
Pretty-print JSON, validate structure, and show helpful error messages for malformed input.
Tip: You can paste, upload a `.json` file or fetch from a URL. After formatting the server has validated the JSON syntax.
Validation / Errors
No server-side syntax errors (or not validated yet). Server validated on last action.
Quick actions
Keyboard & UX
- Paste JSON and press Format & Validate or use Auto-format (client).
- In Edit view you can modify JSON and re-validate.
- Tree view supports expand/collapse nodes.