How much does HTML minification reduce file size?

HTML minification typically saves 5–20% of HTML file size. Combined with gzip (which compresses repeated patterns very efficiently), the total savings are usually modest. CSS and JavaScript minification give much larger wins.

Is it safe to remove HTML comments?

Yes for production. Remove all comments except IE conditional comments ( ). Conditional comments are not supported past IE 9 anyway, so removing them is safe for modern sites. This tool removes all HTML comments unconditionally.

Does this tool remove optional closing tags like and ?

No — this tool only strips comments and collapses whitespace; it doesn't parse HTML structure to identify and remove optional closing tags. That kind of structural minification requires a real HTML parser, not a text-based tool like this one.

Does minification affect SEO?

No. Search engines read the parsed DOM, not raw HTML. Minified HTML parses identically to formatted HTML in all modern browsers and crawlers.

Does this tool also minify inline CSS and JavaScript?

No — it only processes the HTML markup itself. and block contents pass through untouched. Minify them separately with this site's CSS Minifier and JS Minifier tools first, then paste the combined result here.

Is my data safe when using the HTML Minifier?

Completely safe. The HTML Minifier processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

Can I use the HTML Minifier output in commercial projects?

Yes. The HTML Minifier is a utility tool and its output carries no licensing restrictions. You are free to use results in any project, commercial or personal.

Does the HTML Minifier follow official standards?

Yes. The HTML Minifier is built to comply with the relevant industry standard or specification for this utility type. If you encounter an unexpected result, verify your input against the specification — edge cases outside the standard may produce undefined behaviour.

Free HTML Minifier — Allio Tools