Opening an FSKEY File

The FSKEY file type is primarily associated with Internet Security.

FSKEYFile Extension FSKEY
File extension: FSKEY
File type:  Product Key File

What is an FSKEY file?

FSKEY files mostly belong to Internet Security by F-Secure. F-Secure Internet Security protects your computer against all types of security threats.

How do you open FSKEY files?

You need a suitable software like Internet Security to open an FSKEY file. You need a suitable software like Internet Security from F-Secure to open an FSKEY 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 FSKEY file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a FSKEY file directly in the browser:. Just drag the file onto this browser window and drop it.

Online FSKEY Text Viewer

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Unable to Open a .FSKEY File? Quick Solutions:

FSKEY files can come from different programs and aren't universally openable.

  1. Identify the Source: These files often come from software purchases or IT administrators distributing licenses, strongly suggesting an F-Secure Internet Security product key.
  2. Check the Header: Inspect the opening lines in a text editor or hex viewer:
    • Readable text indicates a plain license key.
    • XML/JSON tags suggest structured metadata.
    • Scrambled characters imply an encrypted binary.
  3. Use the Original Software: The original program is usually required; try importing it into F-Secure Internet Security, F-Secure Anti-Virus, or ask the sender if uncertain.
  4. Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for FSKEY File Extension

Related files:

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: F-Secure.License
EXEFile: %ProgramFiles%\Charter High-Speed Security Suite\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\F-Secure Anti-Virus\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\F-Secure\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\Securitoo\av_fw\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\Shaw Secure\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\F-Secure Internet Security\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\com hem security\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\dna Nettiturva\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\Telia\Telias sakerhetstjanster\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\Internet Security Services\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\AntivirusFirewall\TNB\TNBUtil.exe /keycodefile:%1

ProgramID: F-Secure.License
EXEFile: %ProgramFiles%\COGECO Security Services\TNB\TNBUtil.exe /keycodefile:%1


an fskey Product Key File is a special file format by F-Secure and should only be edited and saved with the appropriate software.

How to solve problems with FSKEY files

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