Files with z1 extension are used by the ZoneAlarm firewall software. They contain some various data for internal purposes.

There is one other file type using
the Z1 file extension!

empty icon.z1 - Infocom game module for Z-machine version 1

Detailed description

Software that open z1 file

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Z1 file extension - ZoneAlarm Mailsafe renamed VB file

What is z1 file? How to open z1 files?

File type specification:

Various data file type icon Various data file type

z1 file icon: z1 filetype icon

The z1 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 z1 file extension originally had VB file extension (Visual Basic script 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 z1 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 Z1 file extension back to VB 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:

It is not convertable file format.

List of recommended software applications associated to the .z1 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 z1 file, edit z1 file, convert z1 file, view z1 file, play z1 file etc. (if exist software for corresponding action in's database).

Unspecified and all other actions for computer programs working with z1 file - ZoneAlarm Mailsafe renamed VB file

Click on the software link for more information about ZoneAlarm Pro. ZoneAlarm Pro uses z1 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

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