HTML Minifier - Minify HTML Online Free
Minify HTML by removing whitespace and comments online. Also beautify HTML. Free, runs in your browser—no data sent to servers.
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What Is HTML Minification?
HTML minification removes unnecessary characters from HTML source code without changing its functionality: whitespace between tags, HTML comments, and redundant spaces. The result is a smaller file that loads faster. Minified HTML is functionally equivalent to the original but harder to read.
This tool has two modes: Minify and Beautify. Both run entirely in your browser; no data is sent to a server.
How to Use This Tool
Choose Mode
Select Minify to compress HTML by removing whitespace and comments, or Beautify to add indentation and make it readable.
Paste or Upload HTML
Paste your HTML into the left editor, or use Upload to load a file. Click Sample to try an example.
Copy or Download Result
The right panel updates automatically. Use <strong>Copy</strong> or <strong>Download</strong> to save the result. For full HTML beautification, see the HTML Formatter tool.
HTML Minification Example
Below is an HTML snippet before and after minification:
Original HTML (with whitespace and comments)
Minified output
When Minification Matters
Minifying HTML reduces the number of bytes the browser needs to download. For small pages the difference is negligible, but for high-traffic sites or pages with large HTML the savings add up. Most production build tools (webpack, Vite, etc.) minify HTML automatically; this tool is for manual use or ad-hoc checks.
For readable, formatted HTML use the HTML Formatter tool.
Frequently Asked Questions
Does minification break HTML?
This tool removes HTML comments and collapses whitespace between tags. It does not remove attributes or modify tag content, so the resulting HTML should render identically in browsers.
Will it break inline <pre> or <textarea> content?
The simple whitespace collapsing used here may affect whitespace-sensitive elements like <pre>. For production use, consider a dedicated tool that handles these edge cases.
Is my HTML sent to a server?
No. All processing runs in your browser.
How much can minification reduce file size?
It depends on how much whitespace and how many comments the original has. Typical savings are 5–20% for developer-formatted HTML. Combined with gzip/Brotli compression on the server, the benefit is usually small.
Related Tools
See the HTML Living Standard for authoritative reference. Google's web.dev guide on minification covers the topic broadly. For CSS minification, see cssnano.