Does this HTML tool change program behavior?

It only changes layout or removable whitespace. Review minified output before production use when code relies on unusual syntax.

Processing is local and your code is never uploaded.

HTML Minifier

Minify HTML by removing unnecessary whitespace and comments for a smaller output.

This tool runs entirely in your browser. Your files are never uploaded to a server.

<main><h1>Hello</h1></main>

What this minifier does

Compacts HTML by removing ordinary comments, deleting whitespace between tags, and reducing runs of two or more whitespace characters elsewhere to one space. Complete pre, textarea, script, and style blocks are preserved unchanged when the simple matcher recognizes them; conditional comments beginning with [if are retained.

How to use it

Paste markup, inspect the immediate output, and copy it when ready. Reset clears the editor; no file is downloaded.

Important limitations

This is a regular-expression transformation, not an HTML parser, validator, sanitizer, optimizer, or compressor. It does not remove optional tags or quotes, rewrite attributes, minify embedded CSS/JavaScript, repair markup, or report errors. Malformed raw-text blocks, templates, unusual comments, and whitespace-sensitive inline content can produce unexpected or changed rendering.

How whitespace collapsing works

Text between tags is scanned for runs of two or more whitespace characters, which collapse to a single space; whitespace sitting directly between two tags with nothing else between them is removed entirely rather than collapsed.

Example

Pasting `<div> <p>Hello</p> </div>` produces `<div><p>Hello</p></div>` on one line, with the whitespace between the tags removed entirely rather than shrunk to a single space.

Safe review workflow

Load the minified page in a real browser before deployment, checking inline elements next to visible text where a removed space between tags can visibly join two words together.

Safe workflow and privacy

Keep the source, compare sizes, and test the result in target browsers before deployment. Processing is local and pasted HTML is not uploaded.

Frequently Asked Questions

What does the HTML Minifier do?: Minify HTML by removing unnecessary whitespace and comments for a smaller output.
Does this HTML tool change program behavior?: It only changes layout or removable whitespace. Review minified output before production use when code relies on unusual syntax.
Is my code uploaded?: Processing is local and your code is never uploaded.

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