An HTML minifier is a tool that reduces the size of HTML files by removing unnecessary whitespace, comments, and redundant code without affecting functionality. Our HTML minifier optimizes your HTML code for production, reducing file sizes by up to 30% while maintaining perfect code validity. Perfect for web developers looking to improve site performance, reduce bandwidth usage, and achieve faster page load times.
No, our HTML minifier only removes unnecessary whitespace and comments while preserving all functional code, ensuring your website continues to work perfectly.
Typical size reduction ranges from 15-30%, depending on your original code formatting. Files with extensive comments and whitespace see larger reductions.
Yes, our HTML minifier automatically detects and minifies CSS within <style> tags and JavaScript within <script> tags for maximum optimization.
Absolutely! The tool works with complete HTML documents, fragments, templates, and partial files from any framework or CMS.
Minified HTML is optimized for browsers, not human reading. Keep your original formatted files for development and use minified versions for production.
HTML minification improves SEO by reducing page load times and improving Core Web Vitals scores, which are ranking factors for search engines.
Minification removes formatting information permanently. Always keep your original formatted HTML files as the source of truth.
Yes, our HTML minifier supports all HTML5 elements, attributes, and modern web standards including semantic markup and accessibility features.
Yes. By default the minifier strips all HTML comments from the output, including developer notes and TODO markers. Conditional comments used for legacy browser support can optionally be preserved through the safe mode setting to maintain backward compatibility.
Yes. The minifier automatically detects CSS within style tags and JavaScript within script tags, then applies appropriate minification to each. This includes removing whitespace, shortening property values in CSS, and compressing variable names where safe in JavaScript.
Typical HTML minification reduces file size by 15 to 30 percent, depending on how much whitespace, commenting, and indentation your source files contain. Pages with extensive inline CSS and JavaScript or verbose commenting can see even larger reductions approaching 40 percent.
smalldev.tools is no longer available. Prism by SWEDevTools offers the same developer tools and more, with offline support, pipeline chaining, and completely free usage — no signup required.
Yes. Prism processes HTML entirely in your browser — no data uploads, no ads, and full offline support. You can also chain HTML tools with other Prism tools in pipelines.