HTML Minifier
Free HTML Minifier Online
An HTML minifier removes unnecessary comments and whitespace from markup so pages ship fewer bytes. This free online HTML minifier compresses code in your browser and preserves script, style, pre, and textarea blocks.
Paste a full document or fragment, tune the options, then copy or download the minified HTML. Your markup never leaves the page.
Minified output
What this minifier preserves
Runtime code
Script and style tags are stashed before whitespace passes, so JavaScript strings and CSS formatting stay intact.
Preformatted content
Pre and textarea blocks keep their exact spacing, which protects examples, templates, and user-facing copied text.
Quoted attributes
Attribute values are protected before spacing is trimmed, so aria labels, data attributes, and inline values are unchanged.
Frequently Asked Questions
What is an HTML minifier?
An HTML minifier removes unnecessary comments, spaces, tabs, and line breaks from HTML so the file is smaller while the browser renders the same page.
Is HTML minification safe?
Yes, when sensitive blocks are preserved. This tool keeps script, style, pre, and textarea content intact so JavaScript, CSS, and preformatted text are not rewritten.
Does this upload my HTML?
No. The HTML minifier runs entirely in your browser. Your markup is not uploaded, stored, or logged by NitroClaw.
Should I minify server-rendered HTML?
Usually yes. Minifying server-rendered HTML reduces transfer size, especially on pages with comments or heavy indentation. Test pages with whitespace-sensitive inline elements before changing a production pipeline.
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