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HTML Minifier & Beautifier

Shrink HTML for production, or re-indent it for reading — both in one tool.

Runs in your browserNo sign-up required
Input HTML
252 B
Minified
179 B29% smaller

One Tool, Both Directions

Shrinking HTML for production and cleaning up messy or minified HTML for reading are opposite problems that usually need two separate tools. This one switches between both — minify to strip comments and collapse whitespace with a size comparison shown, or beautify to re-indent based on actual tag nesting when you need to read through HTML that arrived compressed or badly formatted.

How to Use This Tool

  1. 1Choose Minify or BeautifyMinify for production output, Beautify to re-indent messy or minified HTML for reading.
  2. 2Paste your HTMLThe output updates instantly on the right as you type or paste.
  3. 3Check the size comparisonMinify mode shows exactly how much smaller the output is, in bytes and percentage.
  4. 4Copy or download the resultGrab the output directly, or save it as an .html file.

What Minifying Actually Changes

  1. 1Removes HTML commentsComments are useful during development but serve no purpose in production output — they're stripped entirely.
  2. 2Collapses whitespace between tagsLine breaks and indentation between elements exist purely for human readability and add up across a large page — collapsing them reduces size with zero visual effect on the rendered page.
  3. 3Leaves script, style, and pre content untouchedWhitespace inside <script>, <style>, <pre>, and <textarea> tags can be meaningful (or is simply not worth risking), so this tool specifically protects those blocks from being altered while minifying everything else.

Frequently Asked Questions

What does minifying HTML actually do?

It strips comments and collapses unnecessary whitespace between tags and inside text — none of which affects how the page renders, but all of which adds up to a meaningfully smaller file that loads and parses slightly faster.

Does minifying HTML break my page?

It shouldn't — whitespace between tags and comments has no effect on rendering. This tool specifically avoids touching the contents of <script>, <style>, <pre>, and <textarea> tags, since whitespace inside those can matter.

What does the Beautify mode do?

It re-indents HTML based on tag nesting depth, turning a minified or inconsistently formatted file back into a readable, properly indented structure — useful when debugging output from a minifier or a page you didn't write yourself.

How much smaller does minifying actually make a file?

It depends heavily on how much whitespace and how many comments the original has — a heavily-indented, comment-heavy file can shrink significantly, while an already-compact file will shrink very little. The tool shows the exact percentage for your specific input.

Is my HTML uploaded to a server when I use this tool?

No — minification and beautification both happen locally in your browser using JavaScript string processing. Nothing you paste here is ever sent anywhere.

Is this HTML minifier free to use?

Yes, completely free, with no sign-up and no size limit beyond what your browser can comfortably handle.