HTML Minifier

Local-first

Minify HTML snippets by removing comments and unnecessary whitespace.

How this tool actually works

The minifier protects pre, textarea, script, and style blocks, removes ordinary non-conditional comments, collapses repeated horizontal whitespace elsewhere, and keeps one space between adjacent tags.

Remove ordinary HTML comments
Remove inter-tag whitespace
Collapse repeated whitespace

How to use it

Use only a copy of a simple HTML fragment with no whitespace-sensitive content.
Minify and compare rendered text, DOM structure, scripts, styles, and template markers.
Test inline elements, pre, textarea, script, and style explicitly.
Use a syntax-aware build tool for production HTML.

Quick example

Example input

<span>A</span> <span>B</span>
<pre>A  B</pre>
<script>const x = "a  b";</script>

Expected result

The pre block and JavaScript string remain unchanged; ordinary surrounding whitespace is reduced.

Template languages and application-specific comments can still have special meaning; compare rendered DOM and behavior before production use.

Best use cases

Experiment with a known simple static fragment.
Measure the effect of basic whitespace removal.
Identify content that requires a real syntax-aware minifier.

References and scope

HTML and CSS define context-sensitive whitespace behavior. A global regular expression cannot safely preserve every parsing and rendering context.

Sources checked July 24, 2026. Specifications and platform behavior can change; verify the sources before formal use.

Known limitations

Raw pre, textarea, script, and style blocks are restored byte-for-byte.
Conditional comments are retained.
The output is not automatically validated for equivalent application behavior.

FAQ

Is it safe for every HTML document?

No. Template syntax and application-specific comments still require review.

Can it change text spacing?

Repeated horizontal whitespace outside protected blocks is collapsed, while one inter-tag space is retained.

Are script and style contents protected?

Yes. pre, textarea, script, and style blocks are restored unchanged.

Should I test the result?

Yes. Compare DOM, rendering, templates, and behavior before deployment.