Compare products
Two listings, two spec sheets, two hotel rooms - the details line up across the screen instead of across a tab switch.
Comparing two products, reading a paper while you write about it, documentation next to the thing you are building. Tick two tabs in Latr, press Side by side, and they share the screen - left half and right half, with nothing reloaded.
When you need it
Flicking between two tabs means holding one page in your head while you look at the other. Put them next to each other and the comparison does itself.
Two listings, two spec sheets, two hotel rooms - the details line up across the screen instead of across a tab switch.
Two research papers, or a source and the document you are writing from it. The research and study pages have the rest of that workflow.
Documentation on one side, a browser-based code editor or dashboard on the other, so you read and type without losing your place in either.
An article on the left and your notes page on the right. Two pages on one screen, both live, both scrollable.
How to
It works from Latr's popup and from the Windows and tabs page, which list every tab in every window - so the two pages do not even need to be in the same window to start with.
In the popup it is the Open tabs section; on the Windows and tabs page it is above the columns. The first time, Latr asks the browser for permission to see your tabs.
From the same window or different ones. If you cannot see them, type part of the name to filter the list.
Each tab moves into a window of its own, and the two windows fill the left and right halves of the screen you are on. The pages are moved, not reloaded - your scroll position and anything you typed are still there.
Choose Merge into on one of the two windows and the tabs are together again. The window manager page has every way to move tabs between windows.
More than two
Sometimes the comparison has more than two sides. The same button lays out more tabs at once.
Free
Two tabs, two halves
Left half and right half of the screen, from any two tabs in any windows. Free for everyone, with no account and no trial.
Latr Pro
Three or four at once
Three tabs as three columns, or four as a two-by-two grid, so you can show multiple tabs at once. Part of Latr Pro, a one-time $19.
Being exact
Latr does not split a browser window into two panes. It gives each page its own window and places the windows side by side, which is why it works the same in Chrome, Edge and Firefox.
You can do the same by hand, with nothing installed. Drag a tab out of the tab strip so it becomes its own window, then let the operating system snap the two windows into halves: on Windows, drag a window's title bar against the left or right edge of the screen (or press the Windows key with the left or right arrow); on a Mac, hold the pointer over the green button at the top-left of a window and choose a tiling option. Many Linux desktops snap the same way. That is a perfectly good way to open two websites next to each other, and it is what Latr does for you in one press - picking the tabs from a list, from any window, and placing both at once.
Some browsers have also started to offer a split view inside a single window. If yours has one and you like it, use it; Latr does not replace it. What Latr adds is the step before: finding the two pages among forty, wherever they are open, and putting them together without reloading either.
Questions
In Latr, open the list of your open tabs, press Select tabs, tick the two pages and press Side by side. Each one moves into a window of its own, and the two windows fill the left and right halves of your screen. Without an extension, drag one tab out of the tab strip to make a second window, then snap each window to one side of the screen.
No, and it is worth being exact about. Latr puts each tab in its own window and places the windows next to each other, so you get two ordinary browser windows sharing the screen. Each keeps its own tab strip and address bar, and you can resize or move either one as usual.
Yes, with Latr Pro: three tabs become three columns across the screen and four become a two-by-two grid. Two tabs side by side is free. Pro is a one-time $19, not a subscription.
No. The tabs are moved into their new windows, not copied or reopened, so each page stays exactly as it was - the place you had scrolled to, a half-filled form, a video where you paused it. Nothing is opened twice.
On the Windows and tabs page, open the menu on one of the two windows and choose Merge into, then pick the other. Or drag one tab onto the other window’s column. Either way the emptied window closes on its own.
The one you are working on - the screen Latr itself was opened on. The windows fill the space the operating system leaves for them, so a taskbar or dock is not covered.
Yes, in Chrome, Edge and Firefox, and in other Chromium browsers installed from the Chrome Web Store. It needs permission to see your tabs, which Latr asks for the first time you open the tab list - the install itself shows no warnings.
Free, no account, and nothing leaves your device. About ten seconds to install, and one keystroke to use.
Also on Brave, Vivaldi, Arc and Opera - straight from the Chrome Web Store listing.