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WHTML MHT
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Convert WHTML to MHT

Verified by Adam B.· reviewed by FE Editorial ·updated Jul 19, 2026
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Is it possible to convert WHTML to MHT?
Yes - WHTML converts to MHT.

Open the .whtml file in a Chromium browser (Chrome or Edge), then use Save as and pick the single-file option to write a .mht. The main caveat is that any images or scripts loaded from external URLs get inlined into the .mht, but resources that were only referenced (not embedded) may be lost if the browser cannot re-fetch them.

Also to MHT: HTM · WEBARCHIVE · HTML

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert WHTML to MHT?

People convert .whtml to .mht because a plain saved-HTML file keeps its images and CSS in a side folder or as external links, while .mht (MHTML) bundles the page and all its resources into one portable file that is easy to email or archive.

How to convert WHTML to MHT

Microsoft Edge (Save as) EASIEST

Open the .whtml file in Edge, press Ctrl+S, and choose Webpage, Single File (*.mhtml) as the save type to produce an MHTML archive.

About these formats

.WHTML TinyMCE HTML Document

A .whtml file is an HTML document created by the TinyMCE editor inside daedalOS, a desktop environment that runs in the web browser. It holds rich-text content as plain HTML markup with…

Open .WHTML details →
.MHT MIME HTML Web Archive (MHTML)

An MHT (MHTML) file is a complete web page - the HTML, images, CSS, and scripts - bundled into one file using the same MIME packaging email uses. Open it by dragging it into Microsoft Edge…

Open .MHT details →

Quality & what to watch

  • External images, fonts, or scripts that the browser cannot re-download at save time will be missing from the .mht.
  • MHTML has patchy support outside Chromium and Internet Explorer, so the file may not open cleanly everywhere.
  • Interactive JavaScript behavior is not preserved; .mht captures the rendered snapshot, not a live app.

Frequently asked questions

Is .mht the same as .mhtml?
Yes. .mht and .mhtml are the same MHTML format; only the extension differs, so you can rename one to the other.
Why save as a single file at all?
A .mht keeps the page text, images, and CSS in one file, which is far easier to archive or email than an HTML file plus a resources folder.
Can Firefox save .mht files?
Not natively. Firefox needs an add-on to write MHTML, so Chrome or Edge is the simpler route.
Will the .mht look exactly like the original page?
Usually yes for static content, but dynamic or externally loaded elements may render differently or go missing.