File Extension B64

.B64 File

File extension: B64
File type: Base 64 MIME-encoded File


Notes about the B64 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 B64 file type is primarily associated with 'Base 64 MIME-encoded File'. This file type is not often seen on PC systems. Note: The virus W32/[email protected]!M24 discovered 1/17/06 uses this file extension to send itself to others. Be careful if you have received a file of this type in the mail.

Detailed information for file extension B64:


Primary association: Base 64 MIME-encoded File
Mime type: application/x-gzip, application/x-stuffit, application/x-tar, application/x-winzip, application/x-zip-compressed
Program ID: File.B64 , StuffIt.Encoded.File.Expand , StuffItEncoded , WinZip , ZipMagic B64
Related links: MIME Info Page, Access with WinZip, McAfee W32/[email protected]!M24 Description



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 B64 click this link to expand/hide the additional area.

System Info for File Extension .B64

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: File.B64, FileType: ZipGenius Mime/Base64 File, AppName: ZipGenius 1.4 Service Release 3

ProgramID: StuffIt.Encoded.File.Expand, FileType: StuffIt Encoded File, AppName: StuffIt for Windows 8.0
EXEFile: stuffit.exe

ProgramID: StuffItEncoded, FileType: Aladdin Encoded File, AppName: Aladdin Expander

ProgramID: WinZip, FileType: WinZip File, AppName: WinZip
EXEFile: winzip32.exe

ProgramID: WinZip, FileType: WinZip File, AppName: WinZip Executable
EXEFile: winzip32.exe

ProgramID: ZipMagic B64

ProgramID: File.B64
EXEFile: %ProgramFiles%\ZipGenius 5\zipgenius.exe -mimedecode %1

ProgramID: PAENC
EXEFile: %ProgramFiles%\PowerArchiver\POWERARC.EXE %1

ProgramID: StuffIt.Encoded.File.Expand
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt Standard\stuffit.exe -expand %1 -from_shell

ProgramID: StuffIt.Encoded.File.Expand
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt\\stuffit.exe -expand %1 -from_shell -override_open_tutorial

ProgramID: WinZip
EXEFile: %ProgramFiles%\SHAREW~1\WINZIP\winzip32.exe %1

ProgramID: WinZip
EXEFile: %ProgramFiles%\WINZIP\winzip32.exe %1

ProgramID: WinZip
EXEFile: C:\DOCUME~1\ESTELA~1\MYDOCU~1\DEFAUL~1\WINZIP\winzip32.exe %1

ProgramID: WinZip
EXEFile: C:\WINZIP\winzip32.exe %1

ProgramID: WinZip
EXEFile: D:\EXTRA_~1\SMALLP~1\WINZIP9.0\winzip32.exe %1

ProgramID: WinZip
EXEFile: G:\DOWNLO~1\WinZip\winzip32.exe %1

ProgramID: WinZip
EXEFile: G:\SW\WINZIP\winzip32.exe %1

ProgramID: WinZip
EXEFile: Y:\WINZIP\winzip32.exe %1

ProgramID: ZipZag.b64
EXEFile: %ProgramFiles%\ZipZag\zipzag.exe %1

ProgramID: WinZip
EXEFile: %ProgramFiles%\WINZIP~1.1FR\winzip32.exe %1

ProgramID: StuffItEncoded
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.0\Expander\Expander.exe %1

ProgramID: File.B64
EXEFile: %ProgramFiles%\!Ute\ZipGenius 5\zipgenius.exe -mimedecode %1

ProgramID: ACDSee.b64
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\ACDSee.exe %1

ProgramID: StuffIt.Encoded.File.Expand
EXEFile: %ProgramFiles%\Allume Systems\StuffIt\stuffit.exe -expand %1 -from_shell -override_open_tutorial

ProgramID: IZArc
EXEFile: %ProgramFiles%\IZARC\IZARC.EXE %1

ProgramID: ALZip.b64
EXEFile: %ProgramFiles%\ESTsoft\ALZip\ALZip.exe %1

ProgramID: Qzip.b64
EXEFile: %ProgramFiles%\QuickZip\Quickzip.exe %1

ProgramID: StuffIt.Encoded.File.Expand
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.5\stuffit.exe -expand %1 -from_shell

ProgramID: IZArcB64
EXEFile: %ProgramFiles%\IZArc\IZArc.exe

ProgramID: ICEOWSDoc
EXEFile: rundll32 %SystemRoot%\system32\ShellExt\IceGUI.dll,RouteTheCall

ProgramID: WinZip
EXEFile: %ProgramFiles%\WINZIP8\winzip32.exe

ProgramID: PAENC
EXEFile: %ProgramFiles%\Accessories\PowerArchiver\POWERARC.EXE

ProgramID: File.B64
EXEFile: %ProgramFiles%\ZipGenius 6\zipgenius.exe -mimedecode

ProgramID: StuffIt.Encoded.File.Expand
EXEFile: %ProgramFiles%\Smith Micro\StuffIt\stuffit.exe -expand -from_shell -override_open_tutorial

ProgramID: ACDSee 9.0.b64
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\9.0\ACDSeeQV.exe

ProgramID: MimarSinan Codex
EXEFile: %SystemRoot%\explorer.exe /idlist,%I,%L

ProgramID: StuffItEncoded
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.0.2\Expander\Expander.exe

ProgramID: StuffIt11.Archive.Open.Generic
EXEFile: %ProgramFiles%\Smith Micro\StuffIt11\StuffIt11.exe -o

ProgramID: IZArcB64
EXEFile: %ProgramFiles%\IZArc\IZArc.exe

ProgramID: LhaplusArchive_b64
EXEFile: %ProgramFiles%\Lhaplus\Lhaplus.exe


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