DevToolsKit

JSON Formatter

Free

Format, minify, and beautify JSON with syntax highlighting.

Runs 100% in your browser — data stays private
Output will appear here...
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About JSON Formatter

JSON formatter — Our free tool enables developers to quickly format, beautify and minify JSON data. From debugging API responses, formatting config files to preparing data for documentation and more, this tool is quick an easy way of handling JSON.

Unlike desktop apps or CLI tools, DevToolsKit runs entirely in your browser. Your JSON data never leaves your device — making it safe for sensitive API keys, user data, and production configs.

Paste raw JSON, click Format to beautify with proper indentation, or Minify to compress for production. Copy the output or download as a .json file with one click.

Key Features

  • Beautify JSON with 2-space indentation
  • Minify JSON to a single line
  • Highlighting for JSON keys, strings, numbers and booleans
  • Copy formatted output to clipboard
  • Download JSON as a file
  • 100 % browser-based — your data is encrypted.

How to Use

  1. 1Paste or type your JSON into the input field.
  2. 2Click "Format" to beautify or "Minify" to compress.
  3. 3Review the highlighted output below.
  4. 4Copy or download the result.

Common Use Cases

Debugging REST API responses
Formatting package.json or tsconfig files
Preparing JSON for documentation or blog posts
Compressing JSON payloads for production

Frequently Asked Questions

Is this JSON formatter free to use?+

Yes, DevToolsKit JSON Formatter is completely free with no limits, no signup, and no watermarks.

Does my JSON data get sent to a server?+

No. All formatting happens locally in your browser. Your data never leaves your device.

Can I format invalid JSON?+

Invalid JSON will show an error message. Use our JSON Validator tool to find and fix syntax issues first.

What's the difference between format and minify?+

Format adds indentation and line breaks for readability. Minify removes all whitespace to reduce file size.

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