Easy Converter

HTML Minifier

Minify HTML to shave bytes off your pages and accelerate the Largest Contentful Paint. The minifier collapses whitespace, removes optional tags, strips HTML comments, drops redundant attributes and shortens boolean attributes — without breaking your markup. Validate the result before deploying.

How to use

  1. 1

    Paste HTML

    Drop your HTML document into the input area.

  2. 2

    Pick minification level

    Conservative (safe defaults) or Aggressive (extra space savings).

  3. 3

    Copy minified output

    Compare original and minified sizes and copy the result.

Technical details

HTML minification removes characters and constructs that have no effect on rendering: redundant whitespace inside tags, comments, default attribute values, optional closing tags allowed by the HTML5 spec (`</li>`, `</tr>`, `</td>`), and quotes around attribute values that contain no special characters.

A naïve minifier risks corrupting `<pre>`, `<textarea>` and `<script>` content where whitespace is meaningful. The Easy Converter minifier walks the HTML tree, preserves whitespace inside content-sensitive elements, and applies aggressive minification everywhere else. Inline `<style>` and `<script>` blocks are passed through dedicated CSS and JS minifiers for an extra 10–20% size reduction.

For text-rich pages the savings are typically 15–25%, with corresponding gains on First Contentful Paint over slow connections. The benefit compounds when the HTML is served gzipped, because gzip can compress predictable patterns better in a minified document.

Always validate the minified output with a tool like the W3C validator before deploying, especially if your source HTML relies on browser quirks (unclosed tags, missing quotes around attribute values containing spaces).

Frequently asked questions

Will minification break my page?
Conservative mode is safe. Aggressive mode trims optional tags and quotes that some legacy tools rely on — test before deploying.
How much smaller will my HTML be?
Typically 15–25% smaller, with additional savings from gzip on the wire.
Does the minifier touch inline JS or CSS?
Yes. Inline blocks are routed through the CSS and JS minifiers for extra savings.
Will whitespace inside <pre> be preserved?
Yes. Content-sensitive elements (pre, textarea, script, style) keep their original whitespace.
Is my source uploaded?
No. Minification is performed in your browser.
Reviewed by:Easy Converter Engineering Team

This tool was tested and calibrated by our engineering team. All processing happens locally in your browser — your files and data never leave your device.