HTML & CSS Minifier
Every byte counts. Strip away the fat and deliver lean, fast-loading code to your users. Instantly compress your web assets for production.
Note: This tool performs aggressive whitespace removal. For CSS, it removes comments, whitespace, and unnecessary trailing semicolons. For HTML, it collapses whitespace between tags and removes comments.
The Need for Speed
In the age of mobile browsing, speed is everything. Google uses page load time as a ranking factor, and users bounce if a site takes more than 3 seconds to load. Yet, many sites serve "bloated" code full of spaces, indentation, and comments that the browser doesn't need.
Our HTML & CSS Minifier is the diet plan for your code. It aggressively removes every unnecessary character, ensuring your files are as small as physically possible before they travel across the network.
How It Shrinks Files
Human-readable code is formatted for clarity. Machine-readable code is formatted for efficiency. Here's what goes:
Whitespace Removal
Tabs, spaces, and newlines used for indentation are stripped. div { margin: 0; } becomes div{margin:0;}.
Comment Stripping
Developer notes like <!-- Main Header --> or /* TODO: Fix this */ act as dead weight. Minification deletes them all.
Rule Optimization
Advanced minifiers (like ours) can shorten color codes (#ffffff → #fff) and remove trailing semicolons to save precious bytes.
Delimiter Cleaning
Removing spaces around operators (width: 100% → width:100%) saves roughly 1 byte per property. In a 10,000 line CSS file, this adds up.
Deployment
Before uploading files to your server or CDN, run them through a minifier. This is a standard step in modern CI/CD pipelines.
Email Templates
Email clients (like Gmail) clip messages larger than 102KB. Minifying your HTML template ensures your whole email renders.
Ad Banners
Ad networks have strict file size limits (e.g., 150KB zip). Compressing CSS and HTML is crucial to staying under the cap.
Frequently Asked Questions
Can I un-minify the code later?
You can format it to make it readable (using a tool like our Formatters), but original comments and descriptive variable names (if mangled) are gone forever. Always keep a source version of your code.
Is this better than GZIP?
They work together. Minification removes character redundancy. GZIP compresses repeated patterns on the server level. For best results, do both.
Will this break my layout?
It shouldn't, as long as your code is valid syntax. However, if you rely on `white-space: pre` or JavaScript that depends on specific HTML spacing, you should test carefully.
Backup Warning
Minification is a destructive process (data loss of comments/spacing). Do not overwrite your original source files with the minified version unless you have a backup.
Processing Privacy
Your code is processed locally in your browser. We do not upload your source code to our servers.