A zl4 file extension is related to the ZoneAlarm MailSafe, a personal firewall program. A zl4 file contains renamed CHM data.

Detailed description

Software that open zl4 file

Add comment

ZL4 file extension - ZoneAlarm Mailsafe renamed CHM data

What is zl4 file? How to open zl4 files?

File type specification:

Various data file type icon Various data file type

zl4 file icon: zl4 filetype icon

The zl4 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 zl4 file extension originally had CHM file extension (Microsoft help file). Simple renaming will restore the Windows associations with such file, however it is not advised, unless you are absolutely sure it safe to do.

The default software associated to open zl4 file:

ZoneAlarm Pro icon

Check Point Software Technologies Ltd. logoZoneAlarm Pro  Microsoft Windows software

Company or developer:
Check Point Software Technologies Ltd.

ZoneAlarm Pro is a set of tools used to protect computer against hacker attacks,destroy spyware, and secure privacy.

Related articles:

Mailsafe renamed file extensions

Help how to open:

You can rename the ZL4 file extension back to CHM 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.

How to convert:

Probably cannot be converted to other formats.

List of software applications associated to the .zl4 file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open zl4 file, edit zl4 file, convert zl4 file, view zl4 file, play zl4 file etc. (if exist software for corresponding action in File-Extensions.org's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting zl4 files.

Programs that can create zl4 file - ZoneAlarm Mailsafe renamed CHM data

Programs supporting the exension zl4 on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about ZoneAlarm Pro for create zl4 file action.

Microsoft Windows:

Previous file extension
ZL3 file extension

File-Extensions.org > Various data file types

Next file extension
file extension ZL5


Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed