Overview
HTML Cleaner helps you sanitize pasted or generated markup before you reuse it in a page, email, preview, or documentation snippet. It focuses on removing dangerous elements such as scripts and inline event handlers, plus clutter like comments and unwanted attributes. The tool is useful when HTML comes from a CMS, a rich-text editor, user submissions, or copied content from another source. You get cleaned markup in the browser, so you can review the result and decide what to keep before pasting it elsewhere.
Use cases
- Sanitize user-submitted article snippetsRemove inline handlers and embedded scripts from content that came from a form, comment box, or editor submission before it is reused.
- Prepare CMS exports for another systemClean markup copied from a content platform so it is easier to move into a website builder, email template, or documentation page.
- Remove editor clutter from pasted contentStrip comments, tracking attributes, and other noise left behind by word processors or rich-text editors.
- Clean code for previews and demosReduce risky markup in sample HTML before using it in an internal preview, sandbox, or presentation.
- Review copied markup before integrationInspect HTML pasted from a third party and remove unsafe pieces before inserting it into a project.
How it works
- 1
Paste or load HTML into the input field.
- 2
The tool checks tags, comments, and attributes for unsafe or unwanted markup.
- 3
It removes scripts, event handlers, and other risky content according to its cleaning rules.
- 4
Review the cleaned HTML in the output panel and copy it when it looks right.
Examples
Remove an inline handler and script
Input: <section onclick="track()"><script>bad()</script><h2>Update</h2><!-- draft --></section>
Output: <section><h2>Update</h2></section>
The script, comment, and event handler are removed while the section content stays intact.
Keep content, drop unsafe link behavior
Input: <p>Read <a href="/docs" onmouseover="steal()">the guide</a> now.</p>
Output: <p>Read <a href="/docs">the guide</a> now.</p>
The link text and destination remain, but the risky event attribute is removed.
Clean copied markup with noise
Input: <div class="box" data-id="42" onclick="alert(1)"><img src="banner.png" alt="Banner" width="800" height="300"></div>
Output: <div class="box" data-id="42"><img src="banner.png" alt="Banner" width="800" height="300"></div>
Useful layout and image attributes stay in place while the unsafe click handler is stripped.
FAQ
What kinds of elements are removed?
The cleaner targets scripts, comments, and attributes that can execute code or add unwanted behavior, such as inline event handlers. What remains depends on the cleaning rules applied to the input.
Will it change valid tags like div, p, or img?
Ordinary structural tags are usually preserved. The tool focuses on unsafe or noisy parts rather than rewriting your whole document.
Why did some attributes stay while others disappeared?
Attributes that are considered harmless may be kept, while risky ones are removed. That is why a data attribute might remain even when an event handler is stripped.
Can it fix broken nesting or missing closing tags?
No. It can clean the markup, but it is not a full HTML repair tool. If the structure is broken, format or validate the HTML after cleaning.
Why does the result sometimes look shorter than expected?
Comments, scripts, and unsafe attributes are removed by design. If your original HTML relied on those parts, the output will be shorter and may behave differently.