HTML Compressor

Minify simple HTML by removing comments and collapsing whitespace. Paste your code, compare the output and reported sizes, then copy the result. Whitespace-sensitive markup needs particular care; see the tested limits below.

How to compress HTML online

Paste your HTML into the input box, select Compress HTML, inspect Compressed HTML, and use Copy Compressed HTML to copy the result. The size table shows the input size, output size, and space saved. Keep an original copy so you can compare the rendered result.

Tested HTML minification example

In a live check on October 24, 2026, the following input was reported as 78 bytes. The output was 54 bytes, a saving of 24 bytes. The comment was removed, line breaks between tags disappeared, and three spaces inside red blue became one space. These figures describe this sample, not an expected saving for every file.

<!-- sample -->
<div class="card">
  <h2>Hello</h2>
  <p>red   blue</p>
</div>

Observed output (including the leading space):

 <div class="card"><h2>Hello</h2><p>red blue</p></div>

Whitespace that changes the result

This is a simple whitespace compressor. It does not preserve every whitespace-sensitive HTML context. Test a copy before using the result in a page, email, or template.

<pre>A  B
  C</pre><span>A</span> <span>B</span>

The test above returned:

<pre>A B C</pre><span>A</span><span>B</span>

The preformatted spacing and line break were collapsed. The space between adjacent span elements was also removed. That can change visible text spacing. Avoid using this compressor when spaces, line breaks, embedded code, or template syntax must be preserved. The tool offers no setting to protect those regions.

HTML compressor questions

Does this tool validate or repair HTML?

Treat the result as compressed text, not a validation or repair report. This check established whitespace and comment behavior on small snippets. Review your markup and compare it in its actual page context before replacing a working original.

Can I upload a file or download a compressed file?

The current interface provides a text input and a copy button. Paste HTML from your file, then copy the result into your editor. It does not provide file-upload or file-download controls on this page.

How much smaller will my HTML become?

Savings depend on the original formatting and comments. Use the displayed before and after sizes for your own input. Smaller text alone does not establish a faster complete page or improved search rankings.

Related developer tools

For stylesheet text, open the CSS compressor. To optimize vector files, see the SVG optimizer. Browse the free online tools directory for other tasks.

Examples and limitations checked by WebToolBase on October 24, 2026. The check used synthetic snippets and did not establish a maximum reliable input size.