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Unminify

Reverse minification for HTML, CSS, and JavaScript. Beautify compressed code to make it readable for debugging and auditing.

Code Input

Paste your code to unminify and select the code type

What Is the Unminify / Beautifier Tool?

The Unminify / Beautifier is a free online utility that helps you reverse minification for HTML, CSS, and JavaScript, beautifying compressed code into readable, properly indented format for debugging and code analysis.

The Unminify Tool sends your minified code to a server-side API powered by Prettier, the industry-standard code formatter. The API parses the code according to its detected type (JavaScript, CSS, HTML, JSON, or XML) and reformats it with proper indentation, line breaks, and spacing for maximum readability.

Key Features

  • Multi-language support for JavaScript, CSS, HTML, XML, and JSON
  • Automatic code type detection for correct formatting rules
  • Prettier-powered formatting with industry-standard output
  • Proper indentation, line breaks, and spacing for readability
  • One-click copy for immediate use in editors and IDEs
  • Edge runtime processing for fast, reliable formatting

Why Use This Tool

  • Restores readability to minified code for effective debugging and maintenance
  • Helps developers understand third-party, obfuscated, or legacy code structures
  • Produces consistently formatted code that follows established style conventions
  • Saves time compared to manual code reformatting in editors
  • Supports multiple languages in a single unified interface

Common Use Cases

  • Debugging minified production code to identify and fix JavaScript errors
  • Analyzing third-party scripts and libraries by restoring readable formatting
  • Recovering readable code from compressed CSS and HTML sources
  • Preparing minified code for code review and team collaboration
  • Converting single-line JSON responses into readable, structured output

Technical Details

This tool uses Prettier, the industry-standard code formatter, via a serverless API endpoint. Prettier parses the code into an AST (Abstract Syntax Tree) and reprints it with consistent formatting rules. The tool runs on the Vercel Edge Runtime for low-latency processing with automatic language detection.

Frequently Asked Questions

Is this tool free to use?

Yes, the Unminify / Beautifier is completely free to use with no signup, registration, or usage limits required.

Is my data sent to a server?

Your data is sent to our server-side API for processing only. It is not stored, logged, or shared with any third parties and is discarded immediately after processing.

What is unminification?

Unminification formats minified code with proper indentation and spacing, making it readable and easier to debug while preserving functionality.

What code types are supported?

This tool supports JavaScript, CSS, HTML, XML, and JSON using the Prettier formatter.

Is unminified code identical to the original?

Functionally yes, but formatting is added back. Variable names shortened during minification remain shortened.

Can I use this tool offline?

This tool requires a server-side API call, so an internet connection is needed for processing.

Credits & Source

Maintained by Vijay Hardaha. This tool is built with modern web technologies and industry-standard open-source libraries to deliver reliable, high-quality results.

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