JSON Formatter

Format, beautify, minify and validate JSON online. Tree view, syntax highlighting, file upload. Free JSON formatter tool.

JSON Validation Error:
0 Keys
0 Values
0 Max Depth
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Output

How It Works

  1. Paste or type your JSON into the input field.
  2. Click Format to indent and beautify the JSON, or Minify to compress it.
  3. If the JSON is invalid, syntax errors are highlighted automatically.
  4. Click Copy to copy the formatted output to your clipboard.

Example

Input: {"name":"Alice","age":30}
Result: { "name": "Alice", "age": 30 }

FAQ

JSON (JavaScript Object Notation) is a lightweight, text-based data format used to store and transport data. It uses key-value pairs and is supported natively by all modern programming languages.

Common JSON errors include missing quotes around keys, trailing commas after the last item, and mismatched brackets. The formatter highlights the exact position of each error.

No. All formatting and validation happens entirely in your browser. No data is sent to or stored on our servers.

Minification removes all unnecessary whitespace and line breaks from JSON, reducing its size for transmission. Use the Minify button to create a compact version.