Magic Folder

Magic Folder is a Tahoe-LAFS front-end that synchronizes local directories on two or more clients. It uses a Tahoe-LAFS grid for storage. A daemon scans for local changes and polls the Tahoe-LAFS grid for remote changes. Whenever a file is created or changed under the local directory of one of the clients, the change is propagated to the grid and then to the other clients.

Users of this project must be comfortable with the command-line. Users wanting a GUI should try Gridsync (which uses Magic Folder behind the scenes).


Releases are ongoing but we do not yet commit to a particular stable API. That said, many parts are in place and used by projects such as Gridsync (and we do not expect substantial changes).

We encourage adventorous users and fellow developers to experiment. Integration is via an authenticated localhost HTTP API.

Other participants to a synchronized folder are invited using Magic Wormhole. This alows the use of easy-to-transcribe (yet still secure) codes to facilitate end-to-end encrypted communication between the two devices. (Note this means contacting a Mailbox Server run by a third party).

Feedback Please

We are very interested in feedback on how well this feature works for you. We welcome suggestions to improve its usability, functionality, and reliability. Please file issues you find with Magic Folder at the GitHub project, or chat with us on IRC in the channel #tahoe-lafs on

History of Magic Folder

The implementation of the “drop-upload” frontend, on which Magic Folder is based, was written as a prototype at the First International Tahoe-LAFS Summit in June 2011. In 2015, with the support of a grant from the Open Technology Fund, it was redesigned and extended to support synchronization between clients. It should work on all major platforms.

Subsequent to that, Magic Folder was made into a stand-alone project (and daemon) with substantial changes including an improved datamodel – allowing support for robust conflict detection, among other features. Some of this work was supported by an Open Technology Fund grant.