B1 File - opening and understanding

Did your computer fail to open a B1 file? We explain what they are used for and recommend software that we know can open or otherwise handle your .B1 files.

What is a B1 file?

The .b1 file extension is used for a compressed archive file format. This was developed by B1 Team for the B1 Archive Manager software, which is also known as B1 Free Archiver.This file compression tool can archive files and folders into B1 files using high compression ratio. These .b1 files may also be encrypted with 256-bit AES encryption standards.The B1 compressed archive file format was developed from an improved version of the LZMA compressed archive format. This .b1 file type is an open source archive format. To open .b1 files, just simply use the B1 Fre Archiver software.

How to open B1 files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension B1 for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 4 different B1 openers which you will find listed below.

Suggest another file format using extension B1

While we know of one file format using the .B1 file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .B1 file.

Various viewers for this file format

These apps are known to open certain types of B1 files. Remember, different programs may use B1 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

WinRARWinRARUser submitted
B1 Free ArchiverB1 Free ArchiverUser submitted
XZipXZipUser submitted
Microsoft Windows Media PlayerMicrosoft Windows Media PlayerUser submitted
We have not verified any software that we know for certain will work with B1-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with B1-files. If you know one, please use the 'Suggest a program' link below and tell us about it!