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Restore Readability with the Code Un-minifier & Formatter
Make sense of compressed files instantly with our free Code Un-minifier. This developer-centric tool uses local browser logic to expand minified CSS, JavaScript, and HTML into a clean, human-readable format. Because the beautification process happens entirely on your machine, your proprietary code and sensitive scripts remain 100% private and are never sent to a server.
How to Un-minify Code
- 01. Paste Minified Code: Copy your compressed JS, CSS, or HTML into the input area.
- 02. Format Locally: Click the “Format Code” button to trigger the local indentation engine.
- 03. Analyze Output: Review the beautified code in the syntax-friendly dark-mode preview.
- 04. Copy Result: One-click copy the formatted code back to your editor or project.
Frequently Asked Questions
Which programming languages does it support?
The tool is optimized for web languages, including JavaScript, CSS, and HTML. It can also handle JSON and other brace-delimited code structures.
Is my source code secure and private?
Yes. Unlike other formatters that upload your data to a server, our tool works 100% offline in your browser. Your code never leaves your computer.
Does un-minifying reverse “obfuscation”?
This tool restores whitespace and indentation. While it cannot recover original variable names if they were obfuscated to “a” or “b”, it makes the logic significantly easier to follow.
Is there a limit to the code size I can paste?
There is no hard limit, though very large files (several megabytes) may experience a slight delay depending on your device’s processing power.
Can I use this tool for free?
Absolutely. The Code Un-minifier is a free resource provided for developers with no login or subscription required.
Why does the tool show a dark-mode output?
The dark-mode preview is designed to reduce eye strain and mimic professional code editors like VS Code for a better development experience.