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HTML minifier

Minify HTML by stripping comments, collapsing whitespace and removing unnecessary characters. Reduces file size for faster page loads.

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What is HTML Minifier?

An HTML minifier compresses your HTML markup by removing all unnecessary characters without changing the document structure or behavior. This includes stripping HTML comments, collapsing multiple whitespace characters into single spaces, and removing whitespace between tags. The result is a compact single-line HTML document that browsers parse identically to the original but transfers faster over the network. Page load speed is a critical ranking factor for search engines and directly impacts user experience — Google reports that 53% of mobile users abandon pages that take longer than 3 seconds to load. Every kilobyte of unnecessary whitespace and comments adds to your Time to First Byte (TTFB) and Largest Contentful Paint (LCP) scores. This minifier processes your HTML entirely in your browser, showing you exact character savings with before-and-after byte counts. It handles real-world HTML including deeply nested structures, inline scripts, and complex attribute lists. Use it as the final step before deploying HTML templates, email templates, or static pages to production.

How to Use HTML Minifier

  1. 1

    Paste your HTML

    Copy the HTML source code from your editor, CMS, or browser DevTools and paste it into the input area. The tool accepts any valid HTML including full pages, partial templates, and HTML email markup.

  2. 2

    Review size savings

    The tool instantly shows the original size, minified size, and percentage saved. Typical HTML with comments and indentation sees 15-30% size reduction.

  3. 3

    Copy the minified output

    Click Copy to place the minified HTML on your clipboard. Paste it into your production build, deployment pipeline, or CDN origin to serve smaller files to your users.

Features

  • Strips all HTML comments (<!-- -->) from the output
  • Collapses multiple whitespace characters into single spaces
  • Removes whitespace between HTML tags for minimal output
  • Live character count showing original vs minified size
  • Percentage savings displayed for quick optimization review
  • Runs entirely in your browser — no server upload needed

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Frequently Asked Questions

Will minification break my HTML layout?+
No. The minifier only removes comments and excess whitespace that browsers already ignore. Your page renders identically. However, if your CSS relies on whitespace between inline elements, test after minifying.
Does it remove inline CSS or JavaScript?+
No. The tool only removes HTML comments and whitespace. Inline style attributes, script tags, and their contents are preserved as-is. Use dedicated CSS and JS minifiers for those assets.
How much space does HTML minification typically save?+
Savings depend on how much whitespace and comments your HTML contains. Well-formatted HTML with comments typically sees 15-30% reduction. Already compact HTML may only save 5-10%.
Should I minify HTML for email templates?+
Yes. Email clients download the full HTML source, and many have size limits (Gmail clips emails over 102KB). Minifying your email HTML helps stay under those limits and improves delivery speed.
Can I undo the minification?+
Minification is a one-way compression — you cannot reconstruct the original formatting or comments. Always keep your original formatted source files and only use minified output for production deployment.
Is this tool safe for sensitive HTML content?+
Yes. All processing happens locally in your browser. Your HTML is never sent to any server, making it safe for proprietary templates, internal tools, and confidential content.