JSON Formatter Online

What Is a JSON Formatter?

A JSON formatter is a tool that takes raw, minified, or poorly formatted JSON data and reformats it with proper indentation, line breaks, and spacing to make it human-readable. This process is also called JSON beautification or JSON pretty-printing. Our free JSON formatter online runs entirely in your browser, meaning your data never leaves your device.

Why Validate JSON?

JSON validation is crucial when working with APIs, configuration files, or data exchange. A single missing comma or extra bracket can break an entire application. Using a JSON validator helps you catch syntax errors before they cause problems in production. Our validator highlights exact error positions so you can fix issues instantly.

Common JSON Errors

Use Cases for JSON Formatting

• API Development — Format API response JSON for easier debugging and inspection.
• Configuration Files — Read and edit JSON config files with clear structure.
• Data Analysis — Pretty-print large JSON datasets for visual inspection.
• Code Review — Share well-formatted JSON in pull requests and documentation.
• Learning & Teaching — Understand JSON structure through proper indentation.

How to Format JSON

To format JSON, simply paste or type your raw JSON into the input field above and click Format. The tool will parse your JSON and display it with proper 2-space indentation. If your JSON is invalid, the error message will show you exactly where the problem is. You can then copy the formatted result with the Copy button.

JSON Formatting Examples

{"name":"WebUtil","type":"tool","features":["formatter","validator","minifier"],"version":1.0}

{
  "name": "WebUtil",
  "type": "tool",
  "features": [
    "formatter",
    "validator",
    "minifier"
  ],
  "version": 1.0
}

JSON Formatter FAQ