All about ZLS Files

The ZLS file type is primarily associated with ZoneAlarm Mailsafe.

ZLSFile Extension ZLS
File extension: ZLS
File type:  Renamed .SHS File

What is a ZLS file?

ZLS files mostly belong to ZoneAlarm Mailsafe by Zone Labs. Use our "Online ZLS Text Viewer" below to analyze your ZLS file and to see all text it contains.

How to open ZLS files

You need a suitable software like ZoneAlarm Mailsafe to open a ZLS file. You need a suitable software like ZoneAlarm Mailsafe from Zone Labs to open a ZLS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ZLS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ZLS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ZLS Text Viewer

Choose your .zls file to analyze

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.ZLS File Not Opening? How to Fix It:

Because .ZLS files come from different programs, they aren't universally openable.

  1. Identify the Source: If received via email, it's likely a renamed .SHS file quarantined by Zone Labs' ZoneAlarm Mailsafe; if from a game, it may be a save file.
  2. Check the Header: Open the file in a hex viewer to inspect its first bytes:
    • D0 CF 11 E0 suggests a Windows Scrap Object (.SHS).
    • Plain text or XML indicates a custom config file.
  3. Use the Original Software: You usually need the original program; try ZoneAlarm, Microsoft Windows (by renaming to .SHS), or ask the sender if uncertain.
  4. Use this Webpage: Drag and drop your .ZLS file onto this page to detect its format, extract readable text or metadata, and preview contents.

Technical Data for ZLS File Extension

Program ID:
ZAMailSafe
Related files:
zsl, xls, zip, xlsx, zol, zlg, zld

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\CA\eTrust EZ Armor\eTrust EZ Firewall\_INS5576._MP -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\CA\eTrust EZ Armor\eTrust EZ Firewall\ca.exe

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\CA\eTrust EZ Armor\eTrust EZ Firewall\ca.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\iclient.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\zaplus.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\zapro.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\zlclient.exe

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\zlclient.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\Zone Labs\ZoneAlarm\ZONEAL~1.EXE -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\ZONELA~1\ZONEAL~1\ZONEAL~1.EXE -warning %1

ProgramID: ZAMailSafe
EXEFile: Y:\ZoneLabs\ZoneAlarm\zlclient.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\ZoneAlarm\zlclient.exe -warning %1

ProgramID: ZAMailSafe
EXEFile: %ProgramFiles%\CA\eTrust EZ Armor\eTrust EZ Firewall\zonealarm.exe -warning


a zls Renamed .SHS File is a special file format by Zone Labs and should only be edited and saved with the appropriate software.

How to solve problems with ZLS files

  • Associate the ZLS file extension with the correct application.
  • Update your software that should actually open renamed .shs files. Because only the current version supports the latest ZLS file format. Search, therefore, e.g. on the Zone Labs manufacturer website after an available ZoneAlarm Mailsafe update.
  • To make sure that your ZLS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .ZLS file online - secure, fast, and no downloads needed.
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