What is an HTML Cleaner?
An HTML cleaner is a tool that strips unnecessary, invisible attributes and junk markup from HTML code — leaving you with lean, semantic markup that search engines can read without noise.
When you copy content from AI tools like ChatGPT, or from rich text editors like Google Docs, the pasted HTML often carries hidden baggage: data-start, data-end, inline style attributes, empty <span> wrappers, and more. None of that belongs on your website.
Our HTML cleaner automatically detects and removes all of this pollution — preserving your headings, paragraphs, lists, links, and content structure — so you can paste directly into your CMS with confidence.
Why Polluted HTML Hurts Your SEO
Search engine crawlers read your raw HTML byte by byte. When your markup is bloated with meaningless attributes, every crawler request carries extra weight — wasted bandwidth, wasted crawl budget, and a muddied signal about what your content actually is.
Attributes like data-start="1890" and data-end="1923" are position markers that ChatGPT uses internally to track where in its output each block begins and ends. They are completely irrelevant outside of ChatGPT's own interface — but they end up in your published HTML if you paste without cleaning.
Similarly, inline styles from Google Docs or Word exports override your site's design system and can conflict with your CSS. Empty span wrappers from rich text editors add DOM depth without adding meaning. All of this is noise that clean, professional HTML should never contain.
What the HTML Cleaner Removes
data-* Attributes
The primary offender when copying from ChatGPT. Attributes like data-start, data-end, and data-node-id are stripped entirely — every single one, across all elements.
Inline Styles
Inline style="" attributes from Google Docs, Word, and other editors are removed so your site's CSS takes control cleanly.
Redundant Class Attributes
External editor classes like class="gmail_default" or class="MsoNormal" have no meaning on your site and are stripped.
Empty Tags & Useless Wrappers
Empty <span>, <p>, and <div> elements that contain no content are removed. Contenteditable and spellcheck attributes added by editors are also stripped.
What Gets Preserved
Your full content structure stays intact — headings (h1–h6), paragraphs, lists, bold, italic, links, tables, blockquotes, code blocks, and images. Only the noise is removed.
How to Use the HTML Cleaner
- Write or generate your content in ChatGPT, Google Docs, Notion, or any editor.
- Copy the content normally with Ctrl+V / Cmd+V into the Rich Paste input. The tool automatically extracts the underlying HTML.
- Prefer to work directly with HTML? Switch to Raw HTML mode and paste the markup directly.
- The cleaner runs instantly — stripped HTML appears in the output panel on the right alongside a rendered preview.
- Review the stats bar to see exactly what was removed, then hit Copy to grab the clean HTML.
- Paste directly into your CMS, WordPress block editor, Webflow, or wherever you publish.
Before & After Example
<h3 data-start="1890" data-end="1923">
3. Clean anchors
</h3>
<p data-start="1924" data-end="1934"
style="color: black;">
Don't use:
</p>
<ul data-start="1935" data-end="1990">
<li data-start="1935" data-end="1950">
<span class="gmail_default">
click here
</span>
</li>
</ul><h3>3. Clean anchors</h3> <p>Don't use:</p> <ul> <li>click here</li> </ul>
Frequently Asked Questions
Will this break my content structure?+
No. The cleaner only removes attributes and empty wrapper elements — it never removes or reorders your actual content. Headings, paragraphs, lists, links, bold, italic, tables, and images are all preserved exactly as they are.
What is Rich Paste mode?+
Rich Paste mode lets you paste directly from any source — ChatGPT, Google Docs, Notion, email — using a normal Ctrl+V. Your browser sends both the visible text and the underlying HTML when you paste into a rich content area. The tool captures the HTML automatically, so you never need to manually dig into page source.
Does it remove legitimate data attributes I've added myself?+
Yes — currently the tool strips all data-* attributes. This tool is specifically designed for cleaning AI-generated content before pasting into a CMS. If you have intentional data attributes in your markup, use the Raw HTML mode and review the output before copying.
Is my content stored or sent anywhere?+
No. All cleaning happens entirely in your browser using JavaScript. Your content never leaves your device and is never sent to any server.
Ready to clean up your content? Use the free HTML cleaner above — paste your AI-generated or editor content and get clean, SEO-ready markup in seconds.