File Extension SEF

.SEF File

File extension: SEF
File type: Digital Signature File


Notes about the SEF file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The SEF file type is primarily associated with 'Encryptafile' by XenoSystems, LLC. Encryptafile is file encryption and decryption software. The software will also create digital signatures of files.

Detailed information for file extension SEF:


Primary association: Encryptafile
Company: XenoSystems, LLC

Other applications associated with file type SEF:




To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension SEF click this link to expand/hide the additional area.

System Info for File Extension .SEF

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: ACDSee.SEF
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\ACDSee.exe %1

ProgramID: SizeExplorer
EXEFile: %ProgramFiles%\SizeExplorer Pro 3.7.6\SEViewer.exe

ProgramID: ACDSee 9.0.sef
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\9.0\ACDSeeQV.exe

ProgramID: ACDSee 7.0.sef
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\7.0\ACDSee7.exe


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