Will minifying HTML break inline JavaScript or CSS?

No. Inline JavaScript is minified with Terser and inline CSS with clean-css, both of which parse the code before compressing it. Script and style attributes (type="module", nonce, media) are kept, JSON-LD and other non-JavaScript scripts are left untouched, and and content is preserved exactly. If an inline script contains a syntax error, it is left as written.

Can I restore minified HTML back to readable code?

Yes. You can use our Online HTML Viewer or HTML Editor to beautify and re-indent minified markup.

How much file size reduction can I expect?

Typical HTML documents experience a 15% to 35% reduction in size, depending on the volume of comments and structural formatting in the original code.

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Developer Tools

HTML Minifier

Minify HTML to reduce file size.

Instant Results100% Client-Side Privacy100% Free Utility

HTML Minifier & Optimizer

Compress HTML payloads, strip comments, collapse redundant whitespace, and optimize embedded CSS & JS for faster page loads.

Source HTML

1247 bytes

<!DOCTYPE html>
<html lang="en">
  <head>
    
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>High Performance Web App</title>

About HTML Minifier

Compress and minify HTML markup by stripping comments and unnecessary whitespace, and minify inline CSS and JavaScript, without changing how the page renders or behaves.

Why Choose Our HTML Minifier

Feature	Smart Toolverse	Others
Compression Ratio	Reduces HTML payload size by up to 20–40%	Basic whitespace trim
Safe Optimization	Preserves inline scripts, pre tags, and essential conditional comments	Breaks inline JavaScript
Savings Statistics	Displays original size, minified size, and percentage saved	No savings metrics
Privacy Guaranteed	Minifies code in local browser memory with zero server calls	Sends proprietary source code to remote logs

Common Uses & Applications

Reduce webpage payload size, accelerate Time to First Byte (TTFB), improve Google Core Web Vitals (LCP/FCP) scores, and optimize HTML templates for high-traffic websites.

Frequently Asked Questions

Minification strips extraneous whitespace, line returns, and developer comments, reducing the raw HTML file size. Smaller files transfer faster over the network, decreasing page load times and server bandwidth usage.