CSS & JS Minifier
Compress and minify your CSS and JavaScript files to optimize load times completely in-browser.
About Minify Code Online Free — Minify HTML, CSS & JavaScript Code
Optimize production web assets for faster download times and improved Google Core Web Vitals scores by removing bloat from HTML, CSS, and JavaScript files.
Key Features & Capabilities
- Minify HTML, CSS, and JavaScript with whitespace and comment stripping
- Calculates exact percentage file size savings and byte counts
- Option to preserve copyright comments if desired
- One-click copy or file download
- 100% private local code parsing
How to Minify HTML, CSS, or JS Code
Step 1: Select Language
Choose HTML, CSS, or JavaScript mode.
Step 2: Paste Code
Paste your raw source code into the editor.
Step 3: Minify & Copy
Click Minify to shrink file size and copy the optimized code.
Frequently Asked Questions
How much can minifying reduce file size?
Minifying typically cuts file size by 20% to 50% by stripping whitespace, newlines, and unnecessary comments.
Will minifying break my code functionality?
No, standard syntax semantics are strictly preserved.
Related Utility Tools
Why Zaeyon?
Private, free, and browser-based — no account, no uploads, no compromises.
Zero Uploads
Your files never leave your device. All processing happens locally in your browser memory — nothing is sent to any server.
100% Free Forever
No subscriptions, no hidden fees, no daily limits. Every tool on Zaeyon is permanently free to use without an account.
Instant & Powerful
Powered by WebAssembly — the same low-level technology used in native apps — so processing is fast even for large files.
Works Offline
Once the page loads, the WebAssembly engine runs entirely on your device. No internet connection needed to process files.
Works Everywhere
No software installation required. Runs directly in your browser on Windows, Mac, Linux, iOS, and Android.