HTML Cleaner - Beautify, Minify, and Clean Up HTML Code Online
Fix malformed HTML, repair unclosed tags, and reduce bloated markup to clean semantic HTML. Automatically converts deprecated tags (<strike> to <del>, <tt> to <code>, <acronym> to <abbr>), strips junk attributes like dir="ltr" and inline styles, and reformats source code instantly.
How to use HTML Cleaner Online
- Step 1: Paste raw HTML copied from MS Word, Google Docs, WYSIWYG editors, or websites into the input panel.
- Step 2: The cleaner automatically runs client-side with all recommended cleaning rules enabled by default.
- Step 3: Review the sanitized HTML output with repaired tag nesting and clean attributes, then click Copy Clean HTML.
Frequently Asked Questions
How does the HTML Cleaner fix malformed HTML and unclosed tags?
It uses standard browser DOMParser parsing to automatically reconstruct malformed syntax trees, close unclosed tags, and repair invalid element nesting.
Does it clean attributes like dir="ltr" and inline style tags?
Yes! It strips non-standard attributes like dir="ltr", lang (except on <html>), inline style attributes, class names, and id tags, reducing code weight significantly.
Which tags are replaced or converted?
Deprecated tags are converted to modern semantic tags: <strike> becomes <del>, <tt> becomes <code>, <acronym> becomes <abbr>, <dir> becomes <ul>, and <listing>/<xmp>/<plaintext> become <pre>.
Are my code snippets uploaded to an external server?
No, 100% private. All parsing, tag reduction, and attribute stripping run locally in your web browser.