Code Unminifier

Unminify and beautify minified code. Supports JavaScript, CSS, HTML, and JSON with auto-detection.

How It Works

This tool detects the language of your minified code and reformats it with proper indentation and line breaks. All processing happens entirely in your browser — no data is sent to any server.

• Auto-Detection — analyzes your code to determine whether it is JavaScript, CSS, HTML, or JSON
• JavaScript — inserts line breaks after semicolons, braces, and control structures; adds proper indentation for nested blocks
• CSS — places each rule and declaration on its own line with indentation inside blocks
• HTML — adds line breaks between tags and indents nested elements
• JSON — parses and re-serializes with consistent indentation using native JSON methods

What Is Minified Code?

Minification is the process of removing unnecessary whitespace, line breaks, and comments from source code to reduce file size. While minified code runs identically to the original, it is much harder to read and debug. This tool reverses the process by restoring readable formatting.

Common Use Cases

• Debugging — read minified production code from websites and third-party libraries
• Code Review — quickly format compressed code for easier inspection
• Learning — understand the structure of minified scripts by expanding them
• Development — restore readable formatting to bundled or obfuscated output