📋 JSON Formatter

Our free JSON Formatter pretty-prints and validates JSON data instantly. Paste unformatted JSON, click Format, and get properly indented, color-coded output. Perfect for debugging API responses, editing configuration files, and understanding complex data structures.

Example: Input '{"name":"John","age":30,"city":"NYC"}' becomes formatted: { "name": "John", "age": 30, "city": "NYC" }. Nested objects and arrays use 2-space indentation. Invalid JSON shows syntax errors: missing commas, unclosed brackets, trailing commas.

Features: (1) Format — pretty-print with 2-space indentation. (2) Minify — compress to one line for production. (3) Validate — check JSON syntax. (4) Browser-safe — no data sent to any server. Your API keys and sensitive data never leave your device.

JSON is the backbone of modern web development. Every REST API returns JSON. Every npm project has package.json. Every web app configuration uses JSON. Mastering JSON formatting saves hours of debugging time.

Related: Use with our Base64 Encoder for JSON with binary data. The Hash Generator verifies JSON integrity. The Text Cleaner removes unwanted characters from JSON strings. The Text Compare diffs two JSON structures.

Common scenarios: Debugging a REST API response that's one giant line. Validating an exported JSON configuration before import. Preparing JSON for documentation. Converting between minified (production) and formatted (development) JSON.