ARB software and documentation are copyrighted by The ARB-project. External software distributed together with ARB is copyrighted by their respective authors.

ARB and bundled software may be copied on a non-profit basis. Use is permitted for non-profit purposes. For usage conditions in commercial environments please read the detailed copyright notices.

ARB releases_

View log of changes

Also have a look at the production version of arb (=more recent than release).

View log of changes

View log of changes

  • NOTE
  • Don't ask - there IS no version for Windows
  • HINT
  • Linux-Requirements: A recent version of Linux (based on libc 6).

    To detect which version you have type 'ldd /bin/su'. If shows up you have a version based on libc 6.

Hardware Requirements _

ARB can be quite hungry for memory, depending on the database.
Please have a look at the ARB hardware requirements.

Installation instructions_

First, go through the readme:

Then choose version to install from this page.
Click on the respective link and download the following files: : Installation script
arb-*.tgz : ARB program (choose one of the provided versions, not all!)

Once you have downloaded these files, put them into a directory, open a console window in that directory and run the "" script there.
Answer the queries to install the "ARB program".
Happy ARBing!

  • Do not uncompress and untar arb.tgz directly, instead, use the install script (!

Production version_

  • NOTE
  • The production version of arb is installed and used inhouse at MPI for Marine Microbiology in Bremen.

It frequently updates from development changes, i.e. it contains recent bugfixes and newest features, but also may break working things. It is updated at least every few months.

Check out features and bugfixes for the next arb release which are already included in the production version.
Please test these features and report problems.

Information about downloadable production version builds is provided in the arb wiki.

ARB ports_

ARB versions in this section are maintained by ARB users

Mac OSX:
Initial port was done by Ben Hines and Mike Dyall-Smith.
From 2008 until 2013 ongoing mac ports by Matt Cottrell. We included Matts build instructions into the ARB tarball (and online at arb_OS_X_MacPorts.txt and arb_OS_X.txt).
Since 2018 Jan Gerken from the arb-silva team maintains a homebrew recipe for arb.

Debian Distribution:
UNTESTED and/or EXPERIMENTAL version of ARB is available as Debian package and the same can be downloaded here.
Debian version is maintained by Andreas Tille.


Please access the source using our SVN-repository or if you just wanna look, simply browse the source.
You´ll also find a tarball (arbsrc.tgz) in every build.
See also: Instructions to compile ARB from source (on Ubuntu).

  • NOTE
  • If you make changes to the source code and think the public should benefit from them, please send a diff against the latest SVN version (instructions howto do this can be found here).

ARB Databases_

  • If you download databases using windows, only download the .gz files! Otherwise the file will be corrupted.

A central directory of ARB databases available on the web can be found at ARB database central.
We encourage you to share your work with others and to publish a link to your own database there.