Paste any HTML and compress it instantly — removes comments, collapses whitespace, and strips spaces between tags.
Also convert HTML with our HTML to Markdown tool or test patterns with the Regex Tester.
🔒 Your HTML is processed locally — nothing is stored or uploaded.
HTML minification is the process of removing unnecessary characters from HTML source code without changing its functionality. This includes HTML comments, extra whitespace, newlines, and spaces between tags — all of which add bytes to the file without affecting how the browser renders the page. This HTML minifier tool works as an HTML compressor, HTML optimizer, and HTML size reducer for developers and web performance engineers.
Every byte removed from an HTML file reduces the amount of data transferred between the server and the browser. For small pages this difference is minimal, but for high-traffic sites serving millions of pages per month, even a 5–10% reduction in HTML file size translates to measurable bandwidth savings and faster page loads — especially on slower mobile connections where every kilobyte counts.
Web performance engineers use HTML minification as part of a broader build pipeline that also minifies CSS and JavaScript. Together these optimizations contribute to better Core Web Vitals scores — particularly Largest Contentful Paint (LCP) and Time to First Byte (TTFB) — which are ranking factors in Google Search. Serving a leaner HTML document means the browser can begin parsing and rendering content sooner, improving both perceived and measured performance.
Developers use this tool to quickly check how much a specific HTML template or page can be reduced before committing the minified version to production. It is also useful for minifying HTML email templates, where file size limits are stricter and bloated markup can cause rendering issues in certain email clients. Because the minification runs entirely in your browser, sensitive source code never leaves your device — making it safe to use with unreleased templates and internal tools.