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.MIME File Extension

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File TypeMulti-Purpose Internet Mail Extension

DeveloperThe Internet Engineering Task Force
3.3 (9 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryEncoded Files


This file is saved in a binary format, which requires a specific program to read its contents.


Encoded file used by email programs; contains 8-bit encoded data, including characters other than the US ASCII character set; used to support file attachments and a richer character set instead of standard 7-bit messages that are normally sent over email.

More Information

MIME files can often be decoded using a file decompression utility if they are not first recognized by the email program.

MIME files are more commonly seen using a .MIM extension.

Programs that open MIME files
Smith Micro StuffIt Deluxe for Windows
Corel WinZip 20
Microsoft Outlook 2016
Microsoft Outlook Express
Mozilla Thunderbird
Smith Micro StuffIt Deluxe 16
Microsoft Outlook 2016
Apple Mail
Mozilla Thunderbird
Updated 1/4/2011