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parallel bzip2 compression utility

Download lbzip2 2.5

lbzip2 – parallel bzip2 compression utility

The latest released version of lbzip2 is 2.5. You can see its release notes or download it.

If you don’t know what is lbzip2 then keep reading this introduction. If you are looking for examples how to use it then you should read quick start.

If you need help, found a bug or want to request a feature then you can contact lbzip2 maintainer. Any feedback is welcome too.


lbzip2 is a free, multi-threaded compression utility with support for bzip2 compressed file format.

lbzip2 can process standard bz2 files in parallel. It uses POSIX threading model (pthreads), which allows it to take full advantage of symmetric multiprocessing (SMP) systems. It has been proven to scale linearly, even to over one hundred processor cores.

lbzip2 is fully compatible with bzip2 – both at file format and command line level. Files created by lbzip2 can be decompressed by all versions of bzip2 and other software supporting bz2 format. lbzip2 can decompress any bz2 files in parallel. All bzip2 command-line options are also accepted by lbzip2. This makes lbzip2 a drop-in replacement for bzip2.

lbzip2 is portable. It was successfully compiled and ran on wide variety of operating systems and on multiple hardware architectures. It is included in most popular GNU/Linux distributions.

Quality is essential. It was achieved by careful design and thorough testing. lbzip2 test suite consists of more than 300,000 test cases, which are ran on several system architectures before every release. The code is checked using different static analysis tools.