Format, beautify, minify, and validate JSON data online. Paste your JSON and instantly see it beautifully formatted with syntax highlighting and error detection.
JSON (JavaScript Object Notation) is the lingua franca of data exchange on the web. Nearly every API, config file, and NoSQL database uses JSON. But raw API responses often come minified a single dense line with no whitespace making them nearly impossible to read and debug.
Formatting (beautifying) adds indentation, line breaks, and spacing to make JSON human-readable. Minifying strips all whitespace to reduce file size for network transfer. A typical API response can be 30-40% smaller when minified. This tool does both format for debugging, minify for production.
Paste your JSON
Drop in raw JSON from an API response, config file, or database export.
Auto-format & validate
The tool instantly formats the JSON with proper indentation and checks for syntax errors.
Edit and explore
Use the tree view to navigate nested structures, or edit directly in the formatted view.
Copy or download
Copy the formatted or minified output to your clipboard, or download as a file.
API developers
Debug API responses by formatting raw JSON payloads into readable structures.
Frontend engineers
Validate JSON config files, package.json, or mock data before using in code.
QA testers
Inspect API responses during testing to verify data structure and values.
Data analysts
Explore and understand JSON datasets exported from databases or APIs.
JSON formatting (also called beautifying or pretty-printing) is the process of adding proper indentation, line breaks, and spacing to JSON data to make it human-readable. Minified JSON is compact but hard to read; formatted JSON is easy to understand and debug.
Yes! This tool runs entirely in your browser. Your JSON data is never sent to any server. Everything is processed locally on your device.
JSON validation checks whether your data follows correct JSON syntax (proper quotes, brackets, commas). Formatting takes valid JSON and makes it visually readable with proper indentation. Our tool does both simultaneously.
Yes, this tool can handle large JSON data since it runs in your browser. Performance depends on your device, but it typically handles files up to several megabytes without issues.