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HTML Minifier
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Developer & Data formatters/HTML Minifier

HTML Minifier & Compressor — Reduce File Size Online

Minify HTML code online. Remove whitespace, comments, and newlines to reduce file size and improve page load speed. Free and secure.

What is HTML Minify?

An HTML Minifier is a performance optimization tool that compresses your HTML code by removing unnecessary characters without changing its functionality. When developers write code, they use indentation, comments, and newlines to make it readable. However, browsers don't need these extra characters to render the page. This tool strips out whitespace, comments, and formatting, significantly reducing the file size. Smaller HTML files mean faster download times, lower bandwidth usage, and improved Core Web Vitals (LCP) for your website. This is a crucial step in modern web development deployment pipelines. Our tool runs entirely in your browser, allowing you to minify sensitive templates or proprietary code without ever uploading it to a server.

Input Formats

  • Raw HTML code
  • HTML5 templates
  • Snippets with inline CSS/JS

Output Results

  • Minified HTML string
  • Reduced file size statistics
  • Copy-ready code

Key Features

Boost Performance: Faster page load times and better user experience
Reduce Bandwidth: Smaller file sizes save data for mobile users
SEO Friendly: Improved Core Web Vitals (LCP) scores
Privacy: 100% Client-side processing; code never leaves your browser
Smart Compression: Removes comments and whitespace without breaking layout
Reversible: Includes a 'Beautify' option to restore readability
Safe for Templates: Handles HTML5, Angular, React, and Vue templates
Shareable LinksShare your minified HTML code via a link. (Limit: 10KB)

Who is this for?

Web Performance Optimization

Frontend developers minifying HTML templates before deploying to production to improve Lighthouse scores.

Web performanceLighthouseCore Web VitalsPage speedMinificationCompression

Email Marketing

Marketers compressing HTML email templates to ensure they don't get clipped by Gmail (102KB limit).

Email templateGmail clippingHTML emailNewsletterMailchimp

Ad Tech

Ad ops professionals minifying HTML5 banner ads to meet strict file size limits (e.g., 150KB) for ad networks.

HTML5 bannerAd networkFile size limitDisplay adsGoogle Ads

How to Use

1

Paste your HTML code into the input area.

2

Click 'Minify' to compress the code.

3

Check the 'Beautify' option if you want to reverse the process.

4

Copy the result to your clipboard.

Examples

Input

<!DOCTYPE html>
<html>
  <head>
    <title>Hello</title>
  </head>
  <body>
    <h1>World</h1>
    <!-- This is a comment -->
  </body>
</html>

Output

<!DOCTYPE html><html><head><title>Hello</title></head><body><h1>World</h1></body></html>

Common Errors

  • Broken layout due to missing spaces between inline-block elements
  • Removed conditional comments (IE specific)
  • Syntax errors in inline JavaScript

Code Examples

Node.js (html-minifier)

const minify = require('html-minifier').minify;
const result = minify('<p>  Hello  </p>', {
  removeAttributeQuotes: true,
  collapseWhitespace: true
});

Frequently Asked Questions

Does minification break my code?
Generally, no. However, if your layout relies on whitespace between inline-block elements, minification might slightly alter the visual rendering. It's always good to test.
Does it remove comments?
Yes, standard HTML comments are removed to save space. Some tools allow preserving specific comments (like conditional comments) if configured.
Can I minify inline CSS and JS?
This tool focuses on HTML structure. For best results, use dedicated CSS and JS minifiers for your scripts and styles, though simple inline content is often preserved.
Is it reversible?
Yes, you can use the 'Beautify' option (or an HTML Formatter) to add indentation back, although original comments that were stripped cannot be recovered.
Why should I minify HTML?
Minification reduces the number of bytes the browser needs to download, leading to faster First Contentful Paint (FCP) and a better user experience.