The SilverBullet CLI has a sync command that can be used to synchronize local as well as remote Spaces. This can be useful when migrating between different storage implementations. It can also be used to back up content elsewhere. Under the hood, this sync mechanism uses the exact same sync engine used for the Sync Client Modes.

Use cases

  • Migration: you hosted SilverBullet on your local device until now, but have since set up an instance via Deno Deploy and want to migrate your content there.
  • Backup: you host SilverBullet on a remote server, but would like to make backups elsewhere from time to time.


To use silverbullet sync you need a local deno installation of SilverBullet.

General use

To perform a sync between two locations:

silverbullet sync --snapshot snapshot.json <primaryPath> <secondaryPath>

Where both primaryPath and secondaryPath can use any Configuration#Storage configuration.

The --snapshot argument is optional; when set, it will read/write a snapshot to the given location. This snapshot will be used to speed up future synchronizations.

To synchronize two local folders (named testspace1 and testspace2) (not particularly useful, you may as well use cp or rsync):

silverbullet sync --snapshot snapshot.json testspace testspace2


To synchronize a local folder (the current directory .) to a remote server (located at for which you have setup an auth token using the SB_AUTH_TOKEN environment variable of 1234:

SB_AUTH_TOKEN=1234 silverbullet sync .

If you want to perform a “wipe sync”, wiping the destination (secondary) before uploading all files from the primary path there, you can use the --wipe-secondary flag. You will be asked for confirmation:

SB_AUTH_TOKEN=1234 silverbullet sync --wipe-secondary .


To perform a backup, you may simply run the sync commands mentioned above regularly. Be sure to always specify the --snapshot flag in this case, and be sure to actually back up your local copy, e.g. using git.