Formatters

HTML Minifier

Minify HTML code by removing whitespace and comments for optimized output

Interactive HTML Minifier

Tool interface coming soon

About

Minifies HTML using 7 configurable options including comment removal, whitespace stripping, optional tag elimination, quote style normalization, and type attribute removal. Supports preserve selectors to protect specific elements from minification, and shows a size comparison between original and minified output.

Page load speed depends heavily on HTML size, but manual minification is error-prone and hard to maintain. This tool automates aggressive HTML compression while giving control over what to preserve, and quantifies the savings with a visual size comparison.

Who should use this tool?

Web performance engineers optimizing page load times, deployment pipeline maintainers integrating minification, and developers shipping production HTML assets.

Common use cases

Minify HTML templates before deployment to reduce page weight and improve load times
Strip all HTML comments from a production build to remove development notes
Remove optional closing tags (like </li>, </p>) to maximize compression
Normalize single to double quotes across all attributes for consistency
Use preserve selectors to keep specific elements (e.g., for testing) untouched by minification

How to Use

Paste or upload HTML content into the input area

Toggle the 7 options: comments, whitespace, optional tags, quote style, type attrs, etc.

Add preserve selectors using CSS-like selectors to protect elements from minification

Click Minify to process; the tool displays the compressed output alongside the original

Review the size comparison showing original KB, minified KB, and percentage reduction

Copy the minified output for use in your build pipeline or deployment

Examples

Input: '<html><!-- comment --><body><p>Hello</p></body></html>' with comments+whitespace removal. Output: '<html><body><p>Hello</p></body></html>' with size comparison showing 40% reduction.

Input: '<script type="text/javascript">alert(1)</script>' with type attrs removed. Output: '<script>alert(1)</script>'

Best Practices

Always use preserve selectors for elements containing JSON-LD or conditional comments
Enable 'remove optional tags' only if you control the HTML and know your parser handles it
Run a functional test after aggressive minification to verify nothing broke visually
Use the size comparison to decide which options give the best reduction for your specific HTML

Common Mistakes

Removing all whitespace when the HTML relies on inline text spacing for rendering
Removing type attributes from script/style tags when using older browsers that need them
Minifying HTML that still needs editing, making further development harder
Not testing after enabling optional tag removal, which can break DOM parsing in some cases

FAQ

What size reductions can I expect? Typically 20-60%, depending on how many options you enable.

Does minification affect SEO? No, search engines parse minified HTML the same as formatted HTML.

Can I undo minification? Use the html-formatter tool to beautify minified HTML back to readable form.

Are preserve selectors case-sensitive? Yes, they follow standard CSS selector case sensitivity.

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Learning Resources

Dive deeper with our comprehensive guides and tutorials.

HTML Minifier - Beginner's Guide

5 min read

HTML Minifier Advanced Techniques

8 min read

About

Who should use this tool?

Web performance engineers optimizing page load times, deployment pipeline maintainers integrating minification, and developers shipping production HTML assets.

Common use cases

Minify HTML templates before deployment to reduce page weight and improve load times
Strip all HTML comments from a production build to remove development notes
Remove optional closing tags (like </li>, </p>) to maximize compression
Normalize single to double quotes across all attributes for consistency
Use preserve selectors to keep specific elements (e.g., for testing) untouched by minification

How to Use

Paste or upload HTML content into the input area

Toggle the 7 options: comments, whitespace, optional tags, quote style, type attrs, etc.

Add preserve selectors using CSS-like selectors to protect elements from minification

Click Minify to process; the tool displays the compressed output alongside the original

Review the size comparison showing original KB, minified KB, and percentage reduction

Copy the minified output for use in your build pipeline or deployment

Examples

Input: '<html><!-- comment --><body><p>Hello</p></body></html>' with comments+whitespace removal. Output: '<html><body><p>Hello</p></body></html>' with size comparison showing 40% reduction.

Input: '<script type="text/javascript">alert(1)</script>' with type attrs removed. Output: '<script>alert(1)</script>'

Best Practices

Always use preserve selectors for elements containing JSON-LD or conditional comments

Enable 'remove optional tags' only if you control the HTML and know your parser handles it

Run a functional test after aggressive minification to verify nothing broke visually

Use the size comparison to decide which options give the best reduction for your specific HTML

Common Mistakes

Removing all whitespace when the HTML relies on inline text spacing for rendering

Removing type attributes from script/style tags when using older browsers that need them

Minifying HTML that still needs editing, making further development harder

Not testing after enabling optional tag removal, which can break DOM parsing in some cases

FAQ

What size reductions can I expect? Typically 20-60%, depending on how many options you enable.

Does minification affect SEO? No, search engines parse minified HTML the same as formatted HTML.

Can I undo minification? Use the html-formatter tool to beautify minified HTML back to readable form.

Are preserve selectors case-sensitive? Yes, they follow standard CSS selector case sensitivity.

HTML Minifier

About

Who should use this tool?

Common use cases

How to Use

Examples

Best Practices

Common Mistakes

FAQ

Related Tools

Same Category — Formatters

JSON Formatter

SQL Formatter

JavaScript Minifier/Beautifier

HTML Formatter/Validator

Popular Tools

Base64 Encoder/Decoder

JWT Decoder

URL Encoder/Decoder

Learning Resources

Share

HTML Minifier

About

Who should use this tool?

Common use cases

How to Use

Examples

Best Practices

Common Mistakes

FAQ

Related Tools

Same Category — Formatters

JSON Formatter

SQL Formatter

JavaScript Minifier/Beautifier

HTML Formatter/Validator

Popular Tools

Base64 Encoder/Decoder

JWT Decoder

URL Encoder/Decoder

Learning Resources

Share