JSON Tools
Format, validate, minify, and transform JSON
Format, validate, and minify JSON in your browser. Paste or type JSON to pretty-print it, check for syntax errors with clear line-level feedback, compress for production, or sort keys alphabetically. Nothing leaves your browser.
Prototype
Client-side onlyAll processing happens locally — no data is sent anywhere.
Input0 chars
Output
Parse Error
Valid JSON
Capabilities
Pretty print
Validation
Minify
Sort keys
Local-First / Privacy
- All processing happens in your browser — nothing is uploaded
- No data is sent to third-party services
- No telemetry or usage tracking
- Your JSON never leaves your browser tab
