HTML Minifier & Compressor - Optimize Code Online Safely

Free online HTML minifier. Reduce file size by removing spaces, line breaks, and comments to improve page speed. 100% private, client-side processing.

Click for theater mode

You can also drop an .html file into the input area

How to Use

  1. Paste raw HTML into the input field, or choose an .html file.
  2. Pick Basic or Maximum compression, then adjust comment removal, whitespace collapsing, or boolean attribute folding if needed.
  3. Click โ€œMinify HTMLโ€ and review the original size, minified size, and savings percentage.
  4. Click โ€œCopy Minified HTMLโ€ to paste it into your project, or โ€œDownload .min.htmlโ€ to save the file.

Example: click โ€œLoad Sampleโ€ to insert a launch-page snippet with comments, line breaks, boolean attributes, and redundant type attributes, then compress it and compare the savings.

Core Features

  • Instant Size Reduction: Remove extra line breaks, indentation, and safe comments so HTML is ready for production.
  • 100% Client-Side Privacy: Your source code stays in the current browser and is never uploaded, ideal for private templates and commercial projects.
  • Basic or Maximum Mode: Basic mode focuses on safe compression; maximum mode can also collapse boolean attributes and remove redundant type attributes.
  • Detailed Savings Metrics: See original size, minified size, saved bytes, and saved percentage to measure page speed benefits.
  • Copy or Download: Copy minified HTML in one click, or download a .min.html file for your project.

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Calculation Logic

HTML minification removes characters the browser usually does not need for rendering, such as whitespace between tags, indentation, repeated spaces, and regular HTML comments. Basic mode protects content inside script, style, pre, and textarea so whitespace-sensitive snippets stay intact.

Maximum mode adds common safe optimizations, such as folding disabled="disabled" into disabled and removing default type="text/javascript" or type="text/css" attributes from script and style tags.

Everything runs locally in your browser, so sensitive source code is not transmitted over the internet. Always preview critical pages before publishing minified templates, especially when inline scripts or third-party snippets are involved.

FAQ

Does minifying HTML improve SEO?

It can help. Smaller HTML reduces transfer size, improves response speed, and can indirectly support Core Web Vitals and search experience.

Will this tool fix broken HTML?

No. It focuses on minification and file-size optimization. It does not repair unclosed tags, invalid nesting, or template syntax problems.

Is my source code uploaded?

No. Minification, metrics, copying, and downloading all happen in your current browser with no upload or logging.

Can minification break my website?

Basic mode removes relatively safe comments and whitespace while protecting whitespace-sensitive tags. Maximum mode performs additional attribute optimizations, so preview complex templates before deploying.

Can I unminify the HTML later?

You can use an HTML Formatter or editor formatting command to restore readable indentation, but removed comments and redundant characters cannot be recovered automatically.