All about B64 Files

The B64 file type is primarily associated with ALZip.

B64File Extension B64
File extension: B64
File type:  encoded file

What is a B64 file?

B64 files mostly belong to ALZip by EST Soft. B64 files are associated with maintaining data integrity over the internet.

  • Features: B64 file extension is generally used for binary files encoded with Base64 encoding for transmitting data related to emails. Base64 encoding and decoding is needed as the older file securing protocols could support only 7-bit encryption and were not effective with 8-bit data. B64 file format makes it possible to send email attachments to the intended recipient so that they can securely decode the data on their computer without worrying about the data being compromised along the way. The 64 characters that form the universal character set in B64 files are A-Z,a-z,0-9,+ and /. Base64 encoding takes three bytes of character data (3 ASCII characters or 1½ UNICODE characters) and generates 4 data bytes from the universal character set. Thus, Base64 encoding takes in 24 bits of input data and converts it into 32 encoded bits. If the total number of input bits is not divisible by 6 but leaves a reminder of 2, four zeroes are added to the bit representation of the input data and an '== sign is used at the end of the encoded string to signify the addition. Similarly, if the remainder of 4 is left, then two zero are added and a single '=' symbol is used to indicate the same.
  • Adoption: Multiple online software are available that can convert data into B64 file format and back. ALZip compression tool that is compatible with Windows and iOS machines can also be used to open B64 files.

How to open a B64 file

You need a suitable software like ALZip to open a B64 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 B64 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a B64 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online B64 Text Viewer

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How to extract texts from B64 files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

If you want to extract texts from B64 file or capture a screenshot, you can use our free Online B64 File Viewer:
  1. To do this, click the button "Choose your .b64 file to view" on this page.
  2. After your file is opened in browser,
  3. click "Save as..." in the menu.
  4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
  5. Download the converted file.

Programs that open and convert B64 files:

  1. ALZip by EST Soft
    See the previous paragraphs to learn more about the main application. B64 files are often referred to as ALZip compresseds because this type of file is primarily created or used by this software.
  2. WinZip (encoded file) by Corel
    Binary files encoded using Base64 encoding carry the extension B64. This is done to protect sensitive files when they are sent as email attachments. Files of these types can be extracted with the use of decompressing or unzipping utilities like WinZip. p;WinZip is a very popular decompressing utilities which not only creates backup of data but also encrypts data. This file format is classified as Compressed. Related links: Access with WinZip, McAfee W32/MyWife.d@MM!M24 Description

B64 file format:

To view or edit B64 files you need to know the file format, because it determines how the data in this file is stored. The file format can be deduced from the file extension and the signature. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. If there are problems opening a file, you must first determine the file format used. Below is our analysis of the B64 files:

The B64 file extension is used very often and includes a lot of different file formats for different programs. But the following two file formats are common:

The remaining 84% of all B64 files are files with no common format, frequently e.g. KEY, PDF, MIME, ZIP, UEsDB, iVBORw, JVBERi, data, bWwgdmVyc, sIA and eJz. Sometimes used for data, record, order, xlsx, encoded, dprot, image or recon. You can get all the details of your B64 file by dragging it onto this page or by clicking the button "Choose your .b64 file to view" above.

Technical Data for B64 File Extension

File classification:
Compressed
Related files:
base64, txt, zip, png, 64, pdf, jpg, rtf, bmp, jpeg, der, hiv, pem, docx, svg, jfr, dat, mp3, 2, xlsx, zoo, a01, a00

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: 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


a b64 encoded file is a special file format by EST Soft and should only be edited and saved with the appropriate software.

How to solve problems with B64 files

  • Associate the B64 file extension with the correct application.
  • Update your software that should actually open encoded files. Because only the current version supports the latest B64 file format. Search, therefore, e.g. on the EST Soft manufacturer website after an available ALZip update.
  • To make sure that your B64 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .B64 file online - secure, fast, and no downloads needed.
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