File Extension Library

.ZL4 File Extension

  • Developer by: Check Point Software Technologies Ltd.
  • Category: Various data Files

What are .ZL4 files and how to open them?

Can't open .ZL4 file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .ZL4 file.

What is a .ZL4 file extension?

.ZL4 file extension is created by Check Point Software Technologies Ltd.. .ZL4 has been classified as Various data Files.

.ZL4 is ZoneAlarm Mailsafe renamed CHM data

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.

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.

How to fix problems with .ZL4 files

  1. You need to update the application that you normally use to open .ZL4 files. Only the latest version of the software supports the current .ZL4 file format
  2. You need to check the .ZL4 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)