HTML & CSS Minifier
Remove whitespace, comments, and unnecessary characters from HTML and CSS to reduce file size. Paste your code, click minify, and see instant byte savings.
Frequently Asked Questions
How much does minification actually reduce file size?
Typical HTML files compress by 15–30% through minification alone, while CSS files often see 20–40% reductions. The gain depends on how much whitespace and how many comments are in the original source. Well-documented CSS with generous spacing will see larger savings than already-compact code. Combined with gzip compression on the server, minified files can be 70–90% smaller than the original when delivered over the network.
Does minifying HTML break inline scripts or styles?
This tool preserves content inside <script>, <style>, <pre>, and <textarea> blocks as-is. It only removes whitespace between HTML tags and strips HTML comments. Your JavaScript will not be minified or modified. If you need JavaScript minification, use a dedicated JS minifier tool. The safest approach is to test your minified output in a browser before deploying to production.
Should I minify CSS manually or use a build tool?
For small sites or one-off tasks, a manual online minifier works perfectly. For projects with ongoing development, integrating a build tool like PostCSS, cssnano, or webpack's css-minimizer-webpack-plugin automates minification on every build so you never deploy unminified code by accident. The manual approach is fine for WordPress theme files, static sites, or quick optimizations — build tools become valuable when you're iterating frequently on your stylesheets.