HTML Minifier

How to use

1. Paste HTML — Paste your HTML code into the input area
2. Click Minify — The tool removes comments, extra whitespace, and line breaks
3. Copy Result — Copy the minified HTML and use it in production

What Is HTML Minification?

HTML minification is the process of removing unnecessary characters from HTML code without changing its functionality. This includes whitespace, line breaks, comments, and redundant formatting. The result is a smaller file that browsers parse and render identically to the original.

Every byte matters for web performance. HTML is often the first resource a browser downloads, and its size directly affects Time to First Byte (TTFB) and First Contentful Paint (FCP). Minified HTML loads faster, especially on slow mobile connections.

What Gets Removed

• HTML comments: Developer notes wrapped in <!-- --> tags are removed (conditional comments for IE are preserved)
• Extra whitespace: Multiple spaces, tabs, and newlines between tags are collapsed
• Leading/trailing whitespace: Unnecessary whitespace at the start and end of the document is trimmed

Why Minify HTML?

While CSS and JavaScript minification get more attention, HTML minification provides meaningful benefits:

• Faster page loads: Smaller HTML means faster downloads, especially on mobile networks
• Reduced bandwidth costs: For high-traffic sites, even small per-page savings add up significantly
• Improved Core Web Vitals: Faster HTML parsing contributes to better LCP and FCP scores
• SEO benefits: Google considers page speed as a ranking factor

Safe vs Aggressive Minification

This tool performs safe minification that is unlikely to cause issues. More aggressive minification techniques — like removing optional closing tags, stripping default attribute values, or collapsing boolean attributes — can save additional bytes but risk breaking certain edge cases. We err on the side of safety.

When to Minify

Minify HTML before deploying to production. During development, keep your code formatted and commented for readability. Most build tools (Webpack, Vite, Parcel) can minify HTML automatically as part of the production build process.

Privacy

All minification happens in your browser using JavaScript regex operations. Your HTML code never leaves your device. You can safely minify HTML containing proprietary code, API endpoints, or sensitive content.

Also try our CSS Minifier and JavaScript Minifier for complete front-end optimization. Format JSON data with our JSON Formatter.

Frequently asked questions

Will minification break my HTML?

This tool performs safe minification: removing comments, collapsing whitespace between tags, and trimming. It preserves all tags, attributes, and content. Pre/code block whitespace inside tags is preserved.

How much size reduction can I expect?

Typically 10-30% depending on how much whitespace and comments your original HTML contains. Heavily indented HTML with many comments will see the largest savings.

Does it remove CSS or JavaScript?

No. This tool only processes HTML structure. Inline styles and scripts are preserved. For CSS and JS minification, use our dedicated CSS Minifier and JavaScript Minifier.

Is this safe for production?

Yes for basic minification. For production builds, consider using build-tool minifiers (Webpack, Vite) that handle edge cases like pre-formatted text blocks.

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