B1FreeArchiver, a friendly and simple free file archive Manager for Mac. Fast and simple compression/extract. Opens most popular formats: zip, rar, 7z and more. Work with archives just like with regular folders. Remarkable speed and compression ratio with new B1 archive format.

B1 Free Archiver

• Simple & fast
• B1 Archiver is extremely simple to use, you don't need comprehensive manuals or guides. Just install it and enjoy. Also it works very fast even with large archives with many files.

• Safe & secure
• The highest safe standards were applied. B1 Archiver never gathers any kind of personal information and does not install any malicious software.

• Perfect format for everyone
• B1 archive is an open archive format, where best proven solutions were improved even more with new original ideas. It's free and available for both personal and commercial use.

• Open source
• All code is open. You can download sources of all b1 tools and libraries here. Feel free to use them in any of your products or services.

• Developers community
• Tools and libraries are available to work with b1 archives. Please refer to project documentation and discussion group. Feel free to ask support should you have any questions.

• Best speed to compression ratio
• Though classic LZMA compression has been improving for over a decade, there are still some options to explore. For .b1 an improved compression algorithm was designed with much better speed to compression ratio.

• Encryption with password
• With encryption you can protect data with 256 bit AES encryption algorithm. No one will be able to read or extract original files without password.