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JSON Formatter & Validator

Free online tool to format, validate, and beautify JSON instantly. Paste JSON and get readable, indented output—no signup required.

Free online tool. No signup required. All processing runs in your browser.

About this tool

This tool allows developers to quickly format and validate JSON data. Paste your JSON into the input field and the formatter will automatically structure the content with proper indentation. Invalid JSON is highlighted so you can fix errors before using the data in your app or API.

What is JSON Formatter & Validator?

JSON (JavaScript Object Notation) is a lightweight data format used everywhere from APIs to config files. A JSON formatter takes minified or messy JSON and outputs properly indented, readable text so you can debug and work with it easily.

How to use JSON Formatter & Validator

  1. Paste your JSON into the editor.
  2. Click the Format JSON button (or use minify).
  3. Copy the formatted result or clear and try again.

Examples

Example input

{"name":"John","age":30,"active":true}

Example output

{
  "name": "John",
  "age": 30,
  "active": true
}

FAQ

Is this JSON formatter free?
Yes. The tool is free to use with no signup.
Does the formatter store my JSON?
No. All formatting runs in your browser; nothing is sent to our servers.
Can I format minified JSON?
Yes. Paste minified or messy JSON and click Format to get readable, indented output.

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