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HTML Minifier

Minify HTML by removing whitespace and comments.

Minify HTML by removing whitespace and comments.

Quick start: Paste your HTML source into the input area. → Choose conservative mode if the markup is for email or uses whitespace-sensitive layout. → Click Minify to remove whitespace, comments, and optional redundant attributes.

How to use HTML Minifier

  1. 1

    Paste your HTML source into the input area.

  2. 2

    Choose conservative mode if the markup is for email or uses whitespace-sensitive layout.

  3. 3

    Click Minify to remove whitespace, comments, and optional redundant attributes.

  4. 4

    Review the original size, minified size, and percentage saved.

  5. 5

    Copy the compressed HTML, ready for production or email inlining.

Real examples of HTML Minifier in action

Whitespace and comment removed
Before
<!-- nav -->
<ul>
  <li>Home</li>
  <li>About</li>
</ul>
After
<ul><li>Home</li><li>About</li></ul>
Indentation collapsed
Before
<div>
    <p>Hello</p>
</div>
After
<div><p>Hello</p></div>
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Who is HTML Minifier for?

Developers trimming page weight on content-heavy sites

Email developers working within strict size limits

Mobile app teams bundling static HTML assets

Anyone reducing the size of injected HTML snippets

Why use HTML Minifier?

  • Strips whitespace, comments, and optional redundant attributes to cut page weight.
  • Conservative mode preserves rendering-significant whitespace for email safety.
  • Can keep conditional comments when legacy browser support still matters.
  • Shows original size, minified size, and exact percentage saved.
  • Runs in your browser, so your markup is never uploaded to a server.

Common use cases

  • Compress a production HTML template to speed up the first paint on heavy pages.
  • Minify an HTML email where kilobytes affect deliverability and clipping.
  • Shrink a static page being bundled into a mobile app's assets.
  • Reduce the footprint of an HTML snippet injected into a third-party platform.

How HTML Minifier compares to alternatives

Honest comparison to other popular options — pick the right tool for the job.

ToolMain limitation
html-minifier-terserMore options but requires a Node build setup; excessive for a single file
Generic minifier websitesAd-heavy, and aggressive defaults can break whitespace-sensitive or email markup
Server-side gzip/brotli compressionComplementary, not a replacement; it shrinks transfer size but the uncompressed DOM stays as large
HTML MinifierFree, runs in your browser, no sign-up, no watermarks, no file-size limits beyond your device memory.

Limitations & things to know

  • Does not minify the contents of inline CSS or JavaScript blocks
  • Savings are smaller than CSS or JS minification, typically 10 to 30 percent

About HTML Minifier

An HTML minifier reduces the size of a markup file by removing characters the browser does not need to render it: whitespace between tags, line breaks, indentation, and HTML comments. The smaller the document, the faster the initial bytes reach the browser, which helps first paint and overall load time on content-heavy pages. This tool collapses redundant whitespace, removes comments by default, and can strip optional redundant attributes to squeeze the markup further. It includes a conservative mode that is important to understand. Unlike CSS and JavaScript, where whitespace is almost always irrelevant, HTML whitespace can be significant: spaces between inline elements affect rendering, and white-space: pre and similar styles make spacing meaningful. This is especially true in HTML email, where many clients are sensitive to how whitespace is handled. Conservative mode preserves that rendering-significant whitespace so the layout does not shift, which is the safer choice for email templates and anything using preformatted content. Comments are removed by default, but conditional comments (the legacy markup that targets old Internet Explorer) can be preserved when needed. Expect more modest results than with CSS or JS. HTML minification typically saves 10 to 30 percent, with the largest gains on deeply indented, comment-heavy source and very little on already-compact markup. One thing the tool does not do is minify the contents of inline style and script blocks; for those, run the dedicated CSS Minifier and JavaScript Minifier for best results. After minifying it shows the original size, minified size, and percentage saved. Everything runs locally in your browser, so your markup is never uploaded.

Frequently asked questions

Because HTML whitespace can be significant. Spaces between inline elements and content inside white-space: pre affect rendering, so collapsing them can shift the layout. Use conservative mode when whitespace matters, especially for email.
Yes, with conservative mode. Email clients handle whitespace inconsistently, so conservative mode preserves the whitespace that affects rendering while still removing comments and obvious redundancy.
No. It focuses on the markup. For inline style and script blocks, run the dedicated CSS Minifier and JavaScript Minifier for the best compression.
Usually 10 to 30 percent. Deeply indented, comment-heavy source shrinks the most; already-compact HTML changes very little.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

Learn more

Embed HTML Minifier on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

<iframe src="https://www.xevontools.com/embed/minify-html" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px;" title="HTML Minifier — Xevon Tools"></iframe>
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