What is code minification?

Code minification removes unnecessary characters from source code (like whitespace, comments, and line breaks) without changing functionality. This reduces file size and improves website loading speed.

Which languages can I minify?

Our tool supports JavaScript, CSS, and HTML minification. Each language has optimized algorithms to ensure maximum compression while maintaining code functionality.

Will minification break my code?

No, minification only removes unnecessary characters. However, always test your minified code before deploying to production to ensure it works as expected.

How much file size reduction can I expect?

Typical reductions range from 20-80% depending on the original code. Heavily commented code with lots of whitespace will see the greatest reductions.

Is the minification done locally?

Yes, all minification happens in your browser using JavaScript libraries. Your code is never uploaded to our servers.

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Code Minifier

Code Minifier

Minify JavaScript, CSS, and HTML to reduce file size. Runs entirely in your browser.

📥 Input (JavaScript)

Load File

📤 Minified Output

✨ Features

JavaScript Minification

Remove whitespace, comments, and shorten code

CSS

CSS Minification

Compress stylesheets for faster loading

HTML

HTML Minification

Remove unnecessary whitespace from HTML

Size Statistics

See exactly how much space you save

100% Private

Code never leaves your browser

File Upload

Load files directly from your computer

💡 Example Use Cases

Production Deployment

Minify JS and CSS files before deploying to reduce bandwidth and improve load times.

Email Templates

Compress inline CSS and HTML for email templates with strict size limits.

Third-Party Scripts

Minify widget or embed code for distribution on other websites.

Performance Optimization

Quick minification for testing performance improvements before build pipeline changes.

Related Tools

Frequently Asked Questions

Free Online Code Minifier for JavaScript, CSS & HTML

Code minification is essential for optimizing web performance. Our free minifier removes unnecessary characters from JavaScript, CSS, and HTML without changing functionality. Smaller file sizes mean faster downloads and improved user experience.

Why Minify Your Code?

Unminified code includes whitespace, comments, and long variable names that help developers but slow down websites. Minification removes these extras, typically reducing file sizes by 20-60%. For high-traffic sites, this translates to significant bandwidth savings and faster page loads.

JavaScript Minification

JavaScript minification removes whitespace, shortens variable names, removes dead code, and optimizes expressions. This results in significantly smaller files while maintaining identical functionality.

CSS & HTML Minification

CSS minification removes whitespace, comments, and optimizes selectors. HTML minification removes unnecessary whitespace and optional closing tags. Both contribute to faster initial page renders.

Client-Side Processing

All minification happens in your browser using JavaScript. Your source code is never uploaded to any server, making this tool safe for proprietary or sensitive codebases.