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HTM HTML
Free online converter

Convert HTM to HTML

Convert now
HTM to HTML converterFREE
Drop a .HTM file here
or pick one - we convert it to .HTML and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert HTM to HTML

  1. Add your .HTM file - drop it in the box above or click to browse.
  2. Convert it to .HTML in a few seconds.
  3. Download your new .HTML file.

What to expect

  • No content is changed - both extensions hold identical HTML markup, so nothing inside the file is lost or altered.
  • If other pages or scripts link to the old .htm filename, those links will break after the rename and must be updated.
  • Web servers send both .htm and .html with the text/html MIME type, so there is no SEO or performance difference.

Frequently asked questions

Is there any actual difference between .htm and .html?
No - the format is identical. The split exists only because early DOS and Windows systems limited extensions to three characters, so web pages saved on those systems got .htm.
Do I need special software to convert .htm to .html?
No software is required; a simple rename in File Explorer, Finder, or the terminal is all you need.
Will renaming the file break my web page?
The page works exactly the same after renaming. The only risk is if other files link directly to the old .htm name - update those links before renaming on a live site.
My server returns a 404 after I renamed the file - why?
Your server configuration may still point to the old .htm URL; update that setting or add a redirect from the old .htm URL to the new .html one.
Learn about the formats: .HTM · .HTML
Programs that convert HTM: Adobe Contribute · Calibre · iStonSoft ePub Converter · Microsoft Windows NotePad · Microsoft Word · SciTE · Adobe ColdFusion · Adobe ColdFusion Builder