Toucan is a portable application built to synchronize, backup, and encrypt data. Portable applications are designed to run from an external device (USB stick, iPod, etc.) rather than needing to be installed on a system. Toucan includes five synchronization modes (copy, mirror, equalize, move, and clean) that can be combined with a number of checks to reduce the amount of copying. Archive files can be created in zip, 7zip, and gzip formats. Once a full backup is created, Toucan is able to build differential backups including only the changes from the last full backup. Backups can also be optionally encrypted using the AES-256 standard. Toucan includes a command-line system for scheduling repeated jobs, a rules system for excluding specific files from synchronization, and a scripting system built on the Lua programming languages for advanced users to build additional functionality. Toucan is free software available under the GNU General Public License, with source code available on GitHub. Executables are available for Microsoft Windows XP or newer.