ALZip vs bzip2

ALZip is a file compression and extraction program published by ESTsoft. It handles about 40 formats, including ALZ, EGG, ZIP, LZH, TAR, and JAR, and can extract split ALZ, EGG, ZIP, RAR, and ACE archives. Listed features include encryption, split archives, command-line tools, multithreaded ZIP compression, solid and split EGG archives, and Unicode compression. In icon view, users can preview image thumbnails without extracting an archive; linked image viewing requires installing ALSee. ALZip can warn when an archive contains a suspected malicious file and extract it to a safe folder. The PC version can use ALYac to scan compressed files for risks. The product page recommends Windows 11 and 10 for PC and describes a Linux version with similar functions; an Android app is also linked. ESTsoft claims extraction speed can increase by up to 700%, with results depending on format, PC, and environment. The Personal plan costs nothing for qualifying domestic individual users using it noncommercially. Business, education, and public-sector licenses are sold separately, with prices available through the business shopping mall.

bzip2 is a free data compressor for creating and reading compressed files. It provides command-line tools and supports BZ2 (.bz2), BZ (.bz), TBZ2 (.tbz2), and TBZ (.tbz) formats. The maker says its compression typically comes within 10% to 15% of the best available PPM-family techniques, while running around twice as fast for compression and six times faster for decompression. Its limited media-error recovery may allow undamaged portions of a damaged file to be decompressed. The separate libbzip2 library lets programs read and write .bz2 files or compress data in memory. Command-line flags resemble GNU Gzip's, and the distribution should compile without modification on Unix and Win32 systems. bzip2 dates to 1996 and is open source under a BSD-style license. The official site lists version 1.0.8 as stable and offers source code, not executables. Building has a good chance of success with an ANSI C compiler and at least 8 megabytes of spare memory; the source tarball includes documentation in several formats.