Code Minifier
Minify CSS, JS, and HTML
This free online code minifier runs in your browser and is part of our Developer Tools collection.
Code Minifier
Minify CSS, JavaScript, and HTML code to reduce file size for production.
Minification Benefits:
- Reduces file size by removing whitespace and comments
- Faster page load times
- Reduced bandwidth usage
- Better performance for production websites
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Instant In-Browser Execution
Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security
Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive
Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever
No subscription fees, no signups, and no software installations.
How to Use the Online Code Minifier
1
Select Language (CSS, JS, or HTML)
Choose which language you want to compress.
2
Paste Source Code
Paste your uncompressed script, stylesheet, or HTML template into the editor.
3
Configure Compression Rules
Toggle stripping comments, removing redundant whitespaces, and collapsing duplicate line breaks.
4
Minify & Copy Optimized Code
Click "Minify Code" to compress the source and inspect your total byte savings and reduction percentage.
Frequently Asked Questions
Common questions about using this free online code minifier.
How does minification improve website performance? ▾
Minification removes comments, tabs, line breaks, and unnecessary spaces, reducing file transfer size over the network and speeding up browser script parsing.
Will minifying my JavaScript or CSS break functionality? ▾
No. Minification preserves valid syntactic logic and code behavior, removing only cosmetic whitespaces and comments. Ensure your original code has valid semicolons before minifying.
What is the difference between Minification and Obfuscation? ▾
Minification focuses strictly on reducing file size for bandwidth efficiency. Obfuscation intentionally rewrites code structures and mangles variable names to make reverse engineering difficult.
Can I minify inline styles and scripts inside an HTML file? ▾
Yes. When selecting HTML mode, inline `<style>` and `<script>` blocks are minified alongside HTML markup.
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