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HTML Cleaner

Paste messy or bloated HTML and clean it up in one click. Remove inline styles, Word markup, empty tags, scripts, comments, and unwanted attributes — keeping only the structure you need.

Last updated: May 20, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is HTML Cleaner?

HTML pasted from Microsoft Word, Google Docs, or email clients is notoriously messy — it carries dozens of inline styles, Microsoft Office namespace tags, conditional comments, proprietary classes, and empty spans that make the markup bloated and hard to maintain. CMS editors, email template builders, and front-end developers regularly need to clean up this kind of HTML before it goes into production.

This tool lets you selectively strip exactly what you don't want: inline style attributes, script and style blocks, HTML comments, Word-specific markup (mso-* styles, <o:p> tags, conditional comments), empty elements, and class, id, or data-* attributes. The result is lean, clean HTML that's easy to work with.

How to Use HTML Cleaner

1

Paste HTML into the input area or click "Load Sample"

2

Toggle the cleaning options you want to apply

3

The output updates instantly as you toggle options

4

Copy the cleaned HTML or download it as an .html file

5

Check the stats bar to see how much was removed

Common Use Cases

  • CMS editors cleaning up HTML pasted from Microsoft Word or Google Docs before publishing.
  • Front-end developers stripping inline styles from a designer-supplied HTML prototype before styling with CSS classes.
  • Email marketers removing tracking cruft and inline styles from HTML email templates before editing.
  • Back-end engineers sanitising user-submitted HTML before storing or rendering it.
  • Developers preparing HTML snippets for code reviews by removing noisy auto-generated attributes.
  • Teams migrating content between CMS platforms, cleaning vendor-specific markup from exported HTML.

Example Input and Output

HTML pasted from Microsoft Word with mso-* styles, namespace tags, and empty spans is cleaned to readable markup.

Messy HTML input
<p class="MsoNormal" style="mso-style-unhide:no;mso-style-qformat:yes;margin:0cm">
  <span style="font-size:12.0pt;font-family:&quot;Arial&quot;;mso-fareast-font-family:Arial">
    Hello <strong style="mso-bidi-font-weight:normal">World</strong>
  </span>
  <o:p></o:p>
</p>
<p class="MsoNormal" style="margin:0cm">
  <span style="font-size:12.0pt">&nbsp;</span>
</p>
Cleaned HTML output
<p>
  <span>
    Hello <strong>World</strong>
  </span>
</p>

Privacy

All HTML cleaning runs in your browser. No data is uploaded to any server.

Word paste tip

For HTML copied from Word, enable Remove Inline Styles, Remove Word Markup, Remove Empty Tags, and Remove Comments together — this combination removes the majority of Word bloat in one pass.

Frequently Asked Questions

What does "Remove Word Markup" do?
It removes Microsoft Office-specific elements and attributes: <o:p> tags, <w:*> elements, conditional comments (<!--[if ...]>), mso-* style properties, and lang/xmlns:* attributes that Word adds automatically.
What is the difference between HTML Cleaner and HTML Stripper?
HTML Cleaner keeps valid HTML but removes unwanted attributes, styles, and noise — the output is still HTML. HTML Stripper removes all tags entirely and returns plain text.
Can I use this to sanitise user-submitted HTML for display?
This tool is designed for cleanup and editing workflows, not security sanitisation. For safely rendering untrusted user HTML, use a dedicated library like DOMPurify which handles XSS vectors this tool does not.
What are empty tags and why remove them?
Empty tags are elements with no text content or useful children — like <span></span> or <p> </p>. They are common in Word-pasted HTML and add no value. The tool iteratively removes them until none remain.
Is my HTML sent to a server?
No. All cleaning runs in your browser. Your HTML never leaves your device.
Will cleaning change my page layout?
Removing inline styles will affect how elements look if they rely on those styles. If you are cleaning HTML that will be re-styled with a CSS file, that is intentional. If not, leave "Remove Inline Styles" unchecked.

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