File Extension Library


.ZR3 File Extension

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

What is an .ZR3 file?

.ZR3 file extension is created by Check Point Software Technologies Ltd.. .ZR3 has been classified as Various data Files.

.ZR3 is ZoneAlarm Mailsafe renamed file

The ZR3 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 ZR3 file extension had its original file extension renamed for security reasons.


How to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .zr3 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

How to Open .ZR3 file on different platforms

Open .ZR3 File on Windows

  • Right-click a .ZR3
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .ZR3 file and Select check box "Always use this app to open .ZR3 files" Press "Ok"

Open .ZR3 File on Mac

  • Right-click (or Ctrl + Left-click) the .ZR3 file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .ZR3 File on Linux

Right click on the .ZR3 file, choose "Open with" and select a program from the list above

Open .ZR3 File on iPhone

Select a file. If you don't see an application to open the .ZR3 file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .ZR3 File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .ZR3 files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .ZR3 files

  1. You need to update the application that you normally use to open .ZR3 files. Only the latest version of the software supports the current .ZR3 file format
  2. You need to check the .ZR3 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)