developer tool
JSON Formatter & Validator
Format, validate, and minify JSON in your browser. Syntax highlighting and error pointers — private, no uploads.
100% in your browser. Files are processed on your device and are never uploaded to FragCrafts.
How to use
- Paste JSON into the editor.
- Click Format or Validate to see pretty-printed output or errors.
- Copy or download the result.
FAQ
- Are my files uploaded to FragCrafts servers?
- No. Every FragCrafts tool runs entirely in your browser. Your files stay on your device and are never sent to our servers.
- Does this support large JSON files?
- Very large payloads may slow the tab; processing still happens locally on your device.