ToolHub

HTML Minifier & Beautifier

Minify HTML to shrink it, or beautify to format it

106 → 70 bytes · 34% smaller

Minifying removes comments and unnecessary whitespace to shrink file size and speed up page loads. Beautifying re-indents messy or minified HTML so it's readable. Content inside <pre>, <textarea>, <script>, and <style> is preserved. Everything runs in your browser.

Overview

What this tool does

Minify HTML to shrink its file size by removing comments and unnecessary whitespace, or beautify messy and minified HTML with clean indentation. The minify mode shows exactly how many bytes you save. Everything runs in your browser, so your markup is never uploaded.

Smaller, faster

What minifying does

Minifying removes everything a browser doesn't need to render the page:

  • HTML comments (except conditional comments)
  • Whitespace between tags (line breaks and indentation)
  • Runs of multiple spaces collapsed to one
  • Leading and trailing whitespace

The page renders identically, but the file is smaller — typically 10-30% — so it downloads faster. Faster pages improve user experience and Core Web Vitals, which can help SEO.

Readable again

What beautifying does

Beautifying is the reverse: it adds line breaks and consistent indentation so HTML structure is easy to read and edit. Use it to clean up minified HTML you need to work with, or to tidy messy markup pasted from a page or an export.

Safe minification

What's preserved

Whitespace-sensitive content is kept

Some elements depend on their exact whitespace. The minifier preserves the content inside pre, textarea, script, and style tags, where collapsing spaces or removing line breaks would change behavior or appearance.

Practical advice

When to minify

  • One-off pages or email HTML: minify here before deploying
  • Whole sites: let your build tool (Vite, webpack) or CMS minify automatically so your source stays readable
  • Always keep an unminified source copy for editing
  • Minify after all other processing, as the last step before publishing

Behind the scenes

Privacy and how it runs

Runs in your browser

Your HTML is processed locally and never sent anywhere — safe for private and proprietary markup.

Common questions

How much smaller does minified HTML get?

Usually 10-30%, depending on how much whitespace and how many comments the source has. Heavily indented, well-commented files shrink the most. The tool shows the exact percentage saved.

Does minifying HTML help SEO?

Indirectly. Smaller HTML loads faster, and page speed is a ranking factor and affects Core Web Vitals. The effect is modest on its own but part of good performance practice.

Will minifying break my JavaScript or CSS?

No. The content inside script and style tags is preserved exactly. To minify the CSS or JS itself, use a dedicated CSS/JS minifier — this tool focuses on the HTML structure around them.

Can I reverse minified HTML?

Yes — switch to beautify mode and paste the minified HTML to get a clean, indented version back. Note that removed comments can't be recovered, since minifying deletes them.

Should I minify by hand?

For a single page or snippet, this tool is ideal. For an entire site, automate it in your build pipeline so you never edit minified files directly and your source stays maintainable.

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Quick steps

1

Pick minify or beautify

Minify to shrink HTML for production, or beautify to re-indent messy or minified HTML.

2

Paste your HTML

Drop in any HTML. The output updates instantly, and minify mode shows how much smaller the result is.

3

Copy the result

Copy the output with one click. Content inside pre, script, and style tags is left untouched.

Frequently asked questions

What does minifying HTML do?

It removes comments and unnecessary whitespace (line breaks, indentation, and spaces between tags) without changing how the page renders. Smaller HTML downloads faster, which improves page speed and Core Web Vitals.

How much smaller does HTML get?

Typically 10-30% smaller, depending on how much whitespace and how many comments the original has. Heavily indented, well-commented source files shrink the most. The tool shows the exact percentage saved.

Will minifying break my page?

No, when done carefully. This tool collapses whitespace and removes comments but preserves the content of pre, textarea, script, and style tags where whitespace matters. The visible page renders identically.

What does beautifying do?

It re-indents HTML so the structure is easy to read, adding line breaks and consistent indentation. Use it to clean up minified HTML you need to edit, or messy markup pasted from elsewhere.

Should I minify HTML manually?

For a one-off page, this tool is perfect. For a whole site, build tools (like webpack, Vite, or a CMS plugin) usually minify automatically during deployment so your source stays readable while production stays small.

Does my HTML get uploaded?

No. Both minifying and beautifying happen entirely in your browser. Your code is never sent to a server, so it's safe for private and proprietary markup.