Does it keep formatting inside pre and textarea?

Yes. The contents of pre, textarea, script and style tags are preserved exactly, because whitespace is significant there.

Are conditional comments removed?

Standard HTML comments are removed, but IE conditional comments that begin with an opening bracket are kept so legacy markup still works.

How much smaller will my HTML get?

It depends on how much indentation and how many comments the source has. Hand-written, heavily indented pages often shrink 10–30%. The tool shows the character count saved after minifying.

Will minifying change how my page renders?

Generally no. Collapsing whitespace between block elements is safe, and significant whitespace inside pre/textarea/script/style is preserved. Be aware that whitespace between inline elements can affect spacing in rare cases.

Does it minify the CSS and JavaScript too?

No. It preserves the raw contents of script and style tags rather than rewriting them. Use the dedicated CSS minifier and JavaScript minifier for those.

Is my HTML uploaded anywhere?

No — minification runs entirely in your browser and nothing is sent to a server.

HTML Minifier — Gera Tools

Minify HTML in your browser

Paste any markup to remove comments and collapse whitespace between and inside tags, producing a smaller file that downloads faster. It is handy for trimming the page weight of static pages, email templates, and embedded snippets.

How it works

The minifier strips standard HTML comments () while keeping IE conditional comments that legacy pages may still rely on, then collapses runs of whitespace between and inside tags down to a single space or removes them. Crucially it leaves the contents of pre, textarea, script and style exactly as written, because spaces, tabs and newlines are meaningful in those elements. The result is functionally identical markup with the bulk of the layout whitespace gone, and the tool reports how many characters you saved.

Example

This formatted input:

<!-- nav -->
<ul>
  <li>Home</li>
  <li>About</li>
</ul>

minifies to:

<ul><li>Home</li><li>About</li></ul>

The comment and the indentation are gone, but the elements and their text are unchanged. Everything runs locally in your browser — nothing is uploaded.