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.
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