JSON Formatter

JSON formatter and validator helps you format, beautify, and validate JSON data instantly. This free online tool is ideal for developers who want to improve JSON readability and quickly detect syntax errors. Paste your JSON input to automatically format the code and validate whether it is valid JSON.

Input JSON

Formatted / Minified JSON

1 How to use this tool

Paste your JSON data into the Input JSON editor.
Or use Upload File or Load URL to import JSON.
Use the controls to select indentation size (2 spaces, 4 spaces, or Tab).
Click Format to beautify or Minify to compress the JSON.
If there's an error, the tool will indicate the line number and error details.

2 Example

Input (Minified)

{"id":1,"name":"John Doe","roles":["admin","user"],"active":true,"meta":{"created":"2023-01-01","login_count":42}}

Output (Formatted)

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{
  "id": 1,
  "name": "John Doe",
  "roles": [
    "admin",
    "user"
  ],
  "active": true,
  "meta": {
    "created": "2023-01-01",
    "login_count": 42
  }
}

3 Benefits of using this tool

Error Detection

Instantly find syntax errors with precise line numbers to debug your JSON files.

Readability

Transform consistent, unreadable minified JSON into structured, indented code.

4 Privacy and Security

This tool operates entirely in your browser. Your data is processed locally using JavaScript and is never sent to any external server. You can safely use this tool with sensitive information.

Related Tools

Need to convert JSON to other formats? Try our JSON to PHP converter or JSON to CSV converter.

Working with XML? Check out our XML to JSON converter.

Need to format HTML? Use our HTML Formatter.