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HTML Minifier - Compress & Optimize HTML Online

HTML Minifier Tool

How to Use the HTML Minifier

This tool minifies your HTML by removing unnecessary whitespace, comments, and optional closing tags, resulting in a smaller file size and faster page loads. You can paste HTML code, upload a file, or provide a URL.

What Gets Removed?
  • Whitespace: Extra spaces, tabs, and line breaks between tags
  • Comments: HTML comments () are removed
  • Optional tags: Some closing tags that browsers don't require
  • Empty attributes: Unnecessary empty attribute values
Example: Before and After
Before Minification: 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Sample Page</title>
</head>
<body>
    <!-- Main content -->
    <h1>Hello World</h1>
    <p>This is a paragraph.</p>
</body>
</html>

Original: 234 bytes

After Minification: 
<!DOCTYPE html><html lang=en><head><meta charset=UTF-8><title>Sample Page</title></head><body><h1>Hello World</h1><p>This is a paragraph.</body></html>

Minified: 152 bytes (35% reduction)

Benefits of HTML Minification
  • Faster page loads: Smaller files download faster
  • Reduced bandwidth: Saves data transfer costs
  • Better performance: Improves Core Web Vitals scores
  • Lower hosting costs: Less bandwidth usage
  • Improved mobile experience: Especially important on slow connections
When to Use HTML Minification
  • Production websites: Always minify HTML for live sites
  • Build process: Integrate minification into your build pipeline
  • Email templates: Reduce email HTML size
  • Template optimization: Minify reusable templates
When NOT to Minify
  • Development: Keep code readable while developing
  • Debugging: Minified code is harder to debug
  • Learning: Students should work with formatted code
  • Documentation: Examples should be readable
Automated Minification

For production workflows, use build tools to automatically minify HTML:

1. Gulp
const gulp = require('gulp');
const htmlmin = require('gulp-htmlmin');

gulp.task('minify-html', () => {
  return gulp.src('src/*.html')
    .pipe(htmlmin({
      collapseWhitespace: true,
      removeComments: true
    }))
    .pipe(gulp.dest('dist'));
});
2. Webpack
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  plugins: [
    new HtmlWebpackPlugin({
      minify: {
        collapseWhitespace: true,
        removeComments: true,
        removeRedundantAttributes: true
      }
    })
  ]
};
3. Node.js (html-minifier)
const minify = require('html-minifier').minify;

const result = minify(html, {
  removeComments: true,
  collapseWhitespace: true,
  minifyCSS: true,
  minifyJS: true
});
Best Practices
  • Test after minification: Ensure site still works correctly
  • Keep source files: Maintain original, readable HTML separately
  • Use version control: Only commit source files, not minified versions
  • Minify inline CSS/JS: Also optimize embedded styles and scripts
  • Enable Gzip compression: Combine with server-side compression
  • Automate the process: Make minification part of your build workflow
Server Configuration

Enable Gzip compression on your server for even better results:

Apache (.htaccess)
<IfModule mod_deflate.c>
  AddOutputFilterByType DEFLATE text/html text/css application/javascript
</IfModule>
Nginx
gzip on;
gzip_types text/html text/css application/javascript;
gzip_min_length 1000;

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