{ } JSON Formatter

Pretty-print, minify, and validate JSON. Free, instant, 100% private — all processing happens in your browser.

Paste your JSON

Output

About JSON Formatter

JSON (JavaScript Object Notation) is the standard data format for APIs, config files, and web applications. Our formatter helps you:

Pretty Print: Add indentation and line breaks for readability
Minify: Remove all whitespace for smallest file size
Validate: Check for syntax errors with line numbers
Sort Keys: Alphabetically sort object keys

🔒 All processing happens in your browser. Your JSON data never leaves your device.

About JSON Formatter

Pretty-print, validate, minify, and sort JSON data. Paste messy JSON and get clean, indented output instantly. All processing happens in your browser — your JSON data never leaves your device.

Pretty Print

Format JSON with 2-space or 4-space indentation. Makes nested objects and arrays readable at a glance.

Validation

Instantly detect syntax errors with line-level error messages. Fix missing commas, brackets, and quotes.

Minify & Sort

Compact JSON to single line for production. Sort keys alphabetically for consistent formatting.

100% Private

All processing in-browser with JavaScript. No server upload, no data collection, no tracking.