Floccus is a browser extension that synchronizes bookmarks across different browsers and devices. It runs directly within the browser to access the native bookmark API, and offers both one-way and two-way sync modes to control how changes flow between devices. The extension includes an optional end-to-end encryption layer that encrypts bookmark data client-side before transmission, ensuring only the user can decrypt it on other devices.
The extension supports multiple storage backends through a unified sync interface, including WebDAV, Google Drive, and Nextcloud, allowing users to choose between cloud storage or self-hosted servers. It manages multiple independent sync configurations through profiles, each with its own folder, direction, and interval settings. Floccus also extends its sync mechanism to share open browser tabs across devices using the same backend, and includes conflict resolution to combine local bookmark changes with changes from other browsers during synchronization.
The tool provides profile export and import functionality as a JSON file for easy setup across browsers, and supports syncing with Linkwarden instances. It is available for installation from official browser stores for Firefox, Chrome, Edge, and mobile platforms.