Paste your JSON and get a clean, readable output instantly.
Input
Output
About JSON Formatter
A free online JSON formatter and validator that instantly pretty-prints, minifies, and validates your JSON data. Paste raw JSON and get beautifully formatted, syntax-highlighted output in one click. This developer tool runs entirely in your browser — no data is sent to any server.
Key Features
Instant Formatting — Pretty-print JSON with proper indentation and line breaks
Minification — Compress JSON to smallest possible size by removing whitespace
Validation — Detects syntax errors and shows exact error location
Error Highlighting — Pinpoints the line and character where errors occur
Copy to Clipboard — One-click copy of formatted or minified output
100% Client-Side — Your JSON never leaves your browser
How to Use
Paste your raw JSON data into the input textarea above.
Click the Format button to pretty-print, or Minify to compress.
The formatted output appears instantly in the output area.
Copy the result to your clipboard with one click.
Use Cases
API Debugging:Format messy API responses to inspect data structure and values clearly.
Config File Editing:Beautify minified JSON config files for easier reading and editing.
Data Validation:Verify JSON syntax before sending data to an API or saving a config file.
Code Cleanup:Minify JSON payloads to reduce file size for production deployments.
Tips
Tip: If your JSON has errors, the formatter will highlight the exact line and position so you can fix it quickly.
Tip: Use minification to reduce payload size when sending JSON over APIs — it can save 30-50% bandwidth.
Alternatives
VS Code — Built-in JSON formatting with Shift+Alt+F
jq — Command-line JSON processor for terminal users
JSONLint — Popular online JSON validator
FAQ
JSON formatting (or pretty-printing) is the process of taking compact, minified JSON data and adding proper indentation, line breaks, and spacing to make it human-readable. This makes it much easier to understand nested data structures.
Yes, absolutely. This tool runs entirely in your browser using JavaScript. Your JSON data is never sent to any server, so sensitive information like API keys, passwords, or personal data stays completely private.
Formatting (pretty-printing) adds indentation and line breaks to make JSON readable. Minifying removes all unnecessary whitespace to make JSON as compact as possible, which is useful for reducing file size and bandwidth in production.
Yes. If your JSON has syntax errors like missing commas, unmatched brackets, or invalid characters, the formatter will detect them and show you the exact error location with line numbers, making it easy to fix.
JSON (JavaScript Object Notation) is the most common data interchange format on the web. It is used for API requests and responses, configuration files, data storage, and communication between web servers and browsers.