There is only one file type that uses the .MHTML extension:
MIME HTML File
You can open MHTML files with various web browsers, including Google Chrome, Microsoft Edge, and Internet Explorer, whether you are online or offline. However, MHTML files saved in one web browser may appear differently when opened in another web browser because there is no standardized MHTML format utilized among all browsers.
You can also use applications other than web browsers to open MHTML web archives. Some examples include Microsoft Word, Kingsoft Writer, and WizBrother WizHtmlEditor.
Files with the .mhtml extension may be utilized by cybercriminals to distribute dangerous malware so you should verify the source you received the MHTML file from before opening it.
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|Microsoft Internet Explorer||Freeware|
|Mozilla Firefox||Open Source|
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|UCWeb UC Browser for Chrome OS||Free|
Updated: May 25, 2021