JSON Formatter
Paste your JSON and instantly format, validate, and beautify it with proper indentation. Everything runs in your browser; nothing is uploaded.
How to Use
- 1Paste or type your JSON into the input box.
- 2Click Format to pretty-print it, or Minify to compress it.
- 3Copy the result or download it as a .json file.
Features
- Pretty print with 2 or 4 space indentation
- One-click minify
- Clear validation errors with line/column info
- Copy and download results
- Runs entirely in your browser
Example
Click Load Example above the tool to see a sample JSON object formatted instantly.
About This Tool
A JSON formatter takes raw, often unreadable JSON text and reorganizes it with consistent indentation and line breaks, making it easy to scan nested objects and arrays. This is especially useful when working with API responses, configuration files, or log output that arrives as a single unbroken line.
This formatter parses your input using the same JSON engine built into modern browsers, so it will catch the same syntax errors a JavaScript application would encounter. Because everything runs client-side, your data is never sent to a server.
FAQ
- Does this tool upload my JSON anywhere?
- No. Formatting and minifying both happen locally in your browser using JavaScript's built-in JSON parser.
- What's the difference between formatting and minifying?
- Formatting adds indentation and line breaks for readability. Minifying removes all unnecessary whitespace to reduce file size.
- Why does it say my JSON is invalid?
- Common causes are a missing comma, a trailing comma before a closing bracket, or unquoted object keys. The error message includes the line and column where parsing failed.