Canonical utility file

JSON Validator

Paste any JSON, validate it, pretty-print or minify it — with real-time error detection and type inspection. Standalone. Works offline.

How this page works. One file. One job. Paste JSON, click Validate, Format, or Minify. The result appears on the right with detailed error messages when the input is invalid. Nothing leaves the page.

Input JSON

0 chars
Examples

Validation & Output

output
Validation
✓ ready — JSON seems valid
Type: object
Conversion result
formatted or minified JSON appears here