Paste your JSON to format, validate, or minify it instantly. Everything runs in your browser — nothing is sent to a server.
Features
- Format — Pretty-print JSON with 2-space, 4-space, or tab indentation.
- Minify — Compress JSON by removing all whitespace for smaller payloads.
- Validate — Check if your JSON is valid and see exact error locations with line numbers.
- Copy — One-click copy of the formatted or minified output.
When to Use This
- Debugging API responses that come back as a single line of JSON.
- Validating JSON config files (package.json, tsconfig.json, etc.) before committing.
- Minifying JSON payloads to reduce size before sending to an API.
- Checking for common errors like trailing commas, missing quotes, or mismatched brackets.
Privacy
This tool runs entirely client-side using JavaScript. Your JSON data never leaves your browser — no server requests, no logging, no storage.