Sync Tabs Across Windows, Same Tabs in Every Window - Tabtwinsy

Mirror the same tabs and tab groups across every browser window. Open a new window and your tabs are already there. Free and local.

Tabtwinsy keeps the same tabs and tab groups mirrored across all of your browser windows, automatically. If you loved Arc's Spaces, you know the feeling: open a new window and your tabs are just there. Almost no browser does that. Tabtwinsy brings it to Chrome and every Chromium browser. A tab manager for people who work in more than one window Most tab managers help you tidy one window. Tabtwinsy solves the opposite problem: keeping several windows identical, so a second monitor, a second desktop or a new window is never the place where the tab you want is missing. What it does - The same set of tabs mirrored live across every window - Tab groups mirrored too: membership, names, colours and order - Open a new window and it is already populated, focused on the tab you were on - Close a tab in one window and it closes in the others - One click to turn on or off. The toolbar icon is the switch (green ON, grey OFF). No popup, no settings to fiddle with. Good to know - This mirrors windows on THIS computer. It is not cross-device sync and it is not a vertical tab sidebar. - Pinned tabs and browser favourites stay local to their window, because browsers already show those everywhere. Built to be safe with your tabs - A tab you are actively using is never disturbed: anything playing audio (a live call), your active tab, or a known meeting URL (Google Meet, Zoom, Teams, Webex and more) is protected and never closed or navigated away. - A safety limit stops any single sync from removing more than a fraction of a window's tabs, so a hiccup can never take a window apart. - A built-in circuit breaker halts activity if anything ever looks runaway. - Incognito and private windows are ignored completely: never read, mirrored, or touched. Private by design Everything happens on your own computer. Tabtwinsy has no servers and makes no network requests. Your tab data never leaves your device. No analytics, no tracking, nothing sold or shared. Works in Chrome, Dia, Edge, Brave, Vivaldi and other Chromium browsers. Free.