HTML Minifier — Free Online Tool
Reduce HTML file size by removing HTML comments, collapsing whitespace between tags, and stripping empty attributes. Shows original size, minified size, and percentage savings. Uses pure JavaScript regex — no external library.
100% client-side. No uploads. Your data never leaves your browser.
How to use HTML Minifier
- Paste HTML into the input.
- Toggle options (remove comments, collapse whitespace).
- See the minified output and size savings.
- Copy or download the minified HTML.
Frequently Asked Questions
How much can this reduce HTML size?
Typically 10-30% for well-formatted HTML. Well-written HTML with minimal whitespace will see smaller savings.
Is minified HTML valid?
Yes. HTML parsers are whitespace-insensitive between block elements. The minified output is functionally identical.
Should I minify HTML in production?
Yes, but use a build tool (Webpack, Vite) for automated minification. This tool is for manual inspection or learning.
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