HTML Minifier

Compress HTML by removing whitespace, comments, and optional tags. Reduce document size while preserving correct rendering.

100% client-side No signup Free forever

Input HTML

0 bytes

Minified Output

0 bytes

Minification Options

// how to use

How to Use HTML Minifier

How to Use the HTML Minifier

  1. Paste HTML: Enter or paste your HTML code in the input area.
  2. Select options:
    • Remove comments (recommended)
    • Remove whitespace (recommended)
    • Remove optional closing tags
    • Remove attribute quotes (may cause issues)
    • Collapse boolean attributes
  3. Click Minify: Process your HTML with selected options.
  4. View statistics: See original size, minified size, and compression ratio.
  5. Copy or download: Get your minified HTML for use in production.

Before (549 bytes)

<!DOCTYPE html>
<html>
  <head>
    <title>Example</title>
  </head>
  <body>
    <!-- Main content -->
    <p>Hello World</p>
  </body>
</html>

After (85 bytes, 84% reduction)

<!DOCTYPE html><html><head><title>Example</title></head><body><p>Hello World</p></body></html>
// features

Features

  • Remove HTML comments
  • Remove unnecessary whitespace
  • Collapse whitespace in text
  • Remove optional closing tags
  • Remove attribute quotes option
  • Collapse boolean attributes
  • Remove default attributes
  • Preserve conditional comments
  • Size comparison statistics
  • Compression ratio display
  • Download minified file
  • No registration required
// about

About HTML Minifier

HTML documents accumulate whitespace and comments during development that serve no purpose in production. While HTML minification provides smaller gains than CSS or JavaScript compression, every kilobyte matters for performance-critical applications.

What HTML Minification Removes

The minifier optimizes several aspects of your HTML:

  • Whitespace: Extra spaces between tags and within elements
  • Comments: HTML comments () that aren't needed by users
  • Optional tags: Closing tags that HTML5 considers optional
  • Redundant attributes: Default values like type="text" on inputs

Preserving Functionality

HTML minification requires care to preserve meaning. Whitespace inside <pre> and <code> tags is preserved. Conditional comments for IE compatibility remain intact. The tool respects significant whitespace in inline elements where removal would change rendering.

When HTML Minification Matters Most

For server-rendered pages where HTML isn't cached, minification reduces bandwidth on every request. High-traffic sites serving millions of pages daily see measurable infrastructure cost savings. Email HTML templates also benefit, as many email clients have strict size limits.

Integration with Other Optimizations

HTML minification works best as part of a complete optimization strategy: minified HTML that references minified CSS and JavaScript, served with gzip compression and HTTP/2. Together, these optimizations can reduce page weight by 70% or more.

// faq

Frequently Asked Questions

What does HTML minification do?
HTML minification removes unnecessary characters without changing functionality: extra whitespace, comments, optional closing tags, unnecessary quotes, and redundant attributes. A 50KB HTML file might become 35KB - faster loading with identical rendering.
Is minified HTML safe and still valid?
Yes! We follow HTML5 specification for optional syntax. Browsers render minified HTML identically. We never remove required elements or change semantics. The output passes HTML validation. Always test after minification to verify functionality.
What about inline CSS and JavaScript?
Our minifier can optionally minify inline <style> and <script> blocks using specialized CSS/JS minification. Enable separately based on your needs. External files aren't affected - use dedicated minifiers or build tools for those.
How much file size reduction can I expect?
Typical reduction is 10-30% depending on original formatting. Well-formatted HTML with lots of comments and whitespace sees bigger gains. Already compact HTML improves less. Combined with GZIP compression, total savings can be significant.
Can minification break my HTML?
Aggressive options (removing optional tags, collapsing whitespace in <pre> tags) can cause issues. Our safe defaults avoid risky optimizations. For maximum compression, enable options carefully and test thoroughly. We warn about potentially breaking changes.
Should I minify HTML for development or only production?
Keep readable HTML in development for debugging. Minify only for production deployment. Use build tools to automate this - source files stay readable, deployed files are optimized. Never edit minified files directly.
'); }); } // Collapse whitespace if (options.collapseWhitespace) { html = html.replace(/\s+/g, ' '); html = html.replace(/>\s+<'); html = html.replace(/\s+>/g, '>'); html = html.replace(/<\s+/g, '<'); } // Remove line breaks if (options.removeLineBreaks) { html = html.replace(/[\r\n]+/g, ''); } // Remove empty attributes if (options.removeEmptyAttrs) { html = html.replace(/\s+[\w-]+=(''|"")/g, ''); } // Remove optional closing tags if (options.removeOptionalTags) { html = html.replace(/<\/?(html|head|body|option|thead|tbody|tfoot|tr|td|th|li|dt|dd|p|rt|rp|optgroup|colgroup)>/gi, ''); } // Restaurar el contenido preservado de 
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