ZoneAlarm Mailsafe renamed MHT file
File type: Various data file
A zm8 file extension is related to the ZoneAlarm MailSafe component used to protect e-mail. A zm8 file stores renamed Mime HTML (MHTML) document (mht extension by default).
Found 2 different file type records with the same zm8 filename suffix.
File type category:
Various data file
Date updated: February 24, 2018
The zm8 file extension is associated with ZoneAlarm, a personal firewall software, originally created by Zone Labs and currently developed by CheckPoint Software Technologies LTD.
One of ZoneAlarm features is MailSafe, which detects e-mail attachments and warns the user about their presence. When a potentially dangerous attachment is detected, the program quarantines the file with simple renaming of its original file extension, so it breaks the common program association function in Windows and prevents such files from being executed (or launched via associated program).
A file with zm8 file extension originally had MHT file extension. Simple renaming will restore the Windows associations with such file, however it is not advised, unless you are absolutely sure it safe to do.
You can rename the zm8 file extension back to MHT and work with the file normally. This can however be potentially dangerous, because the file was quarantined for a reason. So always re-check it with your anti-virus or anti-spyware programs before you rename the files.
Various elements out of MHT files can be exported or converted.
Software apps that create zm8 files:
Microsoft Windows
Software applications that handle other tasks involving zm8 files:
Microsoft Windows
File type category:
Emulator file
Date updated: October 2, 2026
ZSNES Movie #8 files contain recorded gameplay input for a Super Nintendo game. They allow ZSNES to replay a sequence of controller actions rather than storing a conventional video recording.
The .zm8 file is the movie saved in ZSNES's eighth movie slot. Playback generally requires ZSNES and the corresponding game ROM, because the file records input for the emulator rather than the game itself.
This is a legacy ZSNES-specific emulator format and is not a standard video or interchange format.
Open the file with ZSNES on Microsoft Windows. Use ZSNES's movie playback feature to load the movie, together with the corresponding Super Nintendo game ROM.
A .zm8 file is not a playable video file and will not normally open in a media player.
ZSNES movie files are not normally converted to a standard video format because they contain emulator input data rather than a video stream or a standalone game.
To produce a video, play the movie in ZSNES and record the emulator window with screen-recording software. Conversion to another emulator's movie format may not be supported.
Software applications that handle other tasks involving zm8 files:
Microsoft Windows
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