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This project is not longer maintained and I keep this repo for archiving purposes. Mirall was forked by Owncloud as the base for their client and the new project is maintained at their repository.



Mirall synchronizes your folders with another computer.

The ultimate goals of Mirall are:

  • Network location aware: should not try to sync against your NAS if you are not in the home network
  • It is a zero-interaction tool. So forget about resolving conflicts.
  • It should work silently and realiably.

Mirall is in early stages of development, and may still eat your files or hang your computer.

  • Network location awareness not implemented yet
  • Current version supports local and remote (sftp and smb) folders.
  • It is powered by csync (, however the user does not know and other tools will be incorporated to provide other functionality.

Current issues

  • No sane way to backup conflicting versions yet, this should be solved in a near csync release (--conflictcopy, available in Jann's branch). Right now the newest copy wins.
  • You can't remove folder configurations Workaround: delete ~/.local/share/data/Mirall/folders/$alias and restart
  • Some tasks block the GUI (initial setup of watchers)
  • May be some concurrency issues


  • Improve robustness to minimize user interaction
  • Improve feedback and sync results
  • Add support for other folder types: tarsnap, duplicity, git (SparkleShare)


  • Linux (currently it uses inotify to detect file changes)
  • unison installed in the local and remote machine (you should not care if you got Mirall with your favorite distribution)



  • 1-click install available in

Source code

Building the source code

You need Qt 4.7 and cmake:

mkdir build
cd build
cmake ..

To generate a tarball:

mkdir build
cd build
cmake ..
make package_source



This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.


Mirall folder sharing (DEPRECATED, go here for the maintained fork )



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