xsync

Private, end-to-end encrypted sync of bookmarks and history between browsers.

xsync keeps your bookmarks and history in step across your own browsers. Your data is encrypted on your device before it is uploaded, and there is no account to create. HOW IT WORKS 1. Install xsync in two or more browsers. 2. In the first one choose "Create new chain" and write down the 24-word recovery phrase you are given. 3. In the others choose "Join an existing chain" and enter the same phrase. Changes then sync live through a small relay. The extension never sends the phrase to the relay. WHAT IT SYNCS - Bookmarks: folders, titles, URLs and order. - History: pages you visit (http and https only). Local and private-network addresses, and any sites on your own never-sync list, stay on your device. - Open tabs and installed extensions: see what is open on your other devices and which extensions they have that this browser does not. xsync only lists extensions. It never installs, enables or removes anything. - Send to device: send a link or a short note to one of your devices or to all of them. PRIVACY - Encryption happens on your device (AES-256-GCM, keys derived from your recovery phrase). The relay stores encrypted records. - The relay can still see metadata: your chain id (a public key), how many records and devices you have, record sizes, timing, and your IP address as any web server does. - No analytics, no ads, no tracking, no remote code. The only server xsync talks to is the relay. - Bookmarks, history and tabs and extensions each have their own switch. - "Delete all server data" erases everything on the relay. History records leave the relay 30 days after their last update. Bookmarks stay until you delete them. - You can run your own relay and enter its address in Advanced settings. GOOD TO KNOW - There are no accounts. If you lose the recovery phrase on every device, nobody can recover your data. - Deleting history in one browser does not delete it on your other devices. - Chromium browsers cannot store titles or visit times for history added by an extension, so history that arrives there shows the page address only. WHY XSYNC ASKS FOR PERMISSIONS - Bookmarks and History: to read and write the data it syncs. - Tabs: to list your open tabs for your other devices and to offer "Send this page". - Management: to read the names and ids of your installed extensions. - Storage and unlimited storage: to keep your settings and sync state on this device. - Alarms: to check that the connection to the relay is still alive. - Access to the relay address: to connect to the relay. Support: bala@balakumar.dev