Dualless icon

Dualless

by Ben Lau

v0.4.1 Updated Dec 29, 2023 266KiB
CWS
1M
Users
★ 3.96
276 reviews
#166
of 207.5K
tools
#25 of 64.5K
⚠️Not updated in over 2 years 1M+ users

Description

Dualless is a poor man's dual monitor solution. It splits your browser windows into two by just 2 clicks. The ratio can be adjusted according to your needs.You may have a browser window showing on the right that occupy 30% of your screen. Then the rest of space leave to Google+. The extension simulates the environment of dual monitor. Utilize the space for 16:9 monitor Features * Split current browser window into a pair. And resize their position and size according to the ratio specified by user. (3:7,4:6,5:5,6:4,7:3) * Merge splitted browser windows back to a single window , or make it occupy the full screen area. * MacOS X like windows management. When one of the splitted windows got focused, the other in pair will be shown together. They always occupy the whole screen. * Press middle key on split window button will duplicate the current page on other window. * Bookmark management. Relaunch your favior site in a new tab and windows will be splitted in the recorded ratio. The software is released under open source license of GPL 2.0 Changes ====== Releaser 0.4.1 Date: 2023-12-29 * Bug Fix - crash browser during split / merge * Bug Fix - splitted window size is invalid * Changes: Migrated to Extension V3 API Release 0.4 * Added auto maximize mode * After splitted, if one of the window close, the remaining one will be maximized to occupy all the space * Added bookmark support Release 0.3 * Now works with maximized window! * Press middle key on split window button will duplicate the current page on other window. * Vertical split is supported. * Options page is added. User may enable/disable pairing mode(MacOS simulation) * Ubuntu with Unity works better now
Dualless screenshot 1Dualless screenshot 2Dualless screenshot 3

Reviews (50 cached)

★☆☆☆☆2025-10-16
Shaely Matthews

love it

★☆☆☆☆2025-05-23
Ouguiya Treize

All my tab groups and pinned tabs are gone! I uninstalled immediately.

★☆☆☆☆2023-12-31
R S

Can't choose which windows out of several. It chooses for you. Very frustrating. Clicking the "1" box merges some other window at random into current one. This has no undo feature? Hitting the "1" multiple times merges all your windows into one, undoing your diligence in keeping tabs in separate windows. The window pairing function doesn't seem to work properly. All I need is to have two "NiftySplit" (see that extension) windows paired so that when one is active, the other appears on screen as well. This extension's options seem to imply that is possible, but it won't let me choose which two windows out of the available windows to use the extension on!

★☆☆☆☆2023-05-06
for school but not from school

It crashed my browser (I am using Microsoft Edge btw)

★☆☆☆☆2023-03-19
Python Develop

As useless as 'Split Screen for Google Chrome', uninstall in 5 secs

★☆☆☆☆2023-01-27
Darek Gąsiorowski

Dualles destroys gruops of tabs - I've got 6 groups, each c.a. 20 tabs, now I've one window without groups :( "Split screen" extension does it better.Sometimes millions of users means nothing, especially for old extension without updates.

★☆☆☆☆2022-08-28
Kelsey Guo

I had sorted my tabs into tab groups and it removed them all from their groups. 0/10.

★☆☆☆☆2022-06-15
David Duffield

It is a way to quickly adjust the size of two windows. It does not simulate two monitors as it claims. If it did, when I tried to maximize a window it would again put it in the pre-set layout. If I said to maximize a window, it would maximize it within the area/section it was in not back to your full monitor. Lastly, and something I didn't expect from it, you would be able to select a section/monitor to share during zoom or other screen shares. It does none of that. I'm sure it's fine for a different use case, but it doesn't do what it is advertised to do.

★☆☆☆☆2022-03-16
Cheryl A

I had a bunch of important tabs open, including pinned tabs. Dualless stopped working, closed all tabs and there's no way to retrieve it from search history.

★☆☆☆☆2022-02-17
Dux Nihilo

Literally, yes literally, pointless.

★☆☆☆☆2021-10-11
Santiago

Absolutely useless, if you run windows you can drag a window to the side of the screen and it will automatically fill half your screen (50%). I can drag 3 apps on my monitors resolution. We don't talk about apple since I dont use it.

★☆☆☆☆2021-05-26
Lyra “YourMumsGF” Blood

pressing windows key+left/right does the same thing and you can do it with every app. useless

★☆☆☆☆2020-12-18
C Tang

cant work with powerpoint files

★☆☆☆☆2020-10-06
prizza

You don't really need a chrome extension for dual screening.You can just click Win Key+ Left/Right arrow.That does it.And even the extension is good for nothing.I wouldn't add it if I were you.

★☆☆☆☆2020-08-18
Dhammike Jayawickrama

bad

★☆☆☆☆2020-06-28
David

Am I simple minded or what? I find this useless. It's very difficult to get the tabs I want into the right place. It seems much easier to just open a new window, resize it and put it where I want it. In less time than it took me to write that.

★☆☆☆☆2018-01-30
ilham ramadhani

cant using like before

★☆☆☆☆2016-08-17
The Utter Nerve Of That Woman

Cant get it to work, perhaps another app renders it invalid.

★☆☆☆☆2014-06-04
Brett

It only splits windows, it doesn't actualy split the tabs INSIDE the window.. pointless

★☆☆☆☆2014-03-26
Purcarea Cornel

NOT GOOD!

★★☆☆☆2025-11-06
Google User

Such a long explanation which isn't really accurate. The extension resizes your browser into only two browsers with a pre-defined size you chose, it's not handy at all.

★★☆☆☆2023-11-20
Chidi Moseri

Initially quite useful; now it crashes my browser each time I launch the extension

★★☆☆☆2023-09-16
Taavi Miku

Still not what I looking for. When splitted vertically (there's upper and lower part), It shows in the lower part a new browser window with address bar and everything else that wastes the screen's real estate.

★★☆☆☆2022-10-07
Angela Gonzalve

Ive been using this for a little over a year or two. I loved it at first but now it won't stop glitching. If I use it now, it will close out all my tabs. Please fix this because I genuinely found it very helpful.

★★☆☆☆2020-11-17
_RainSake

Does what computers can already do but worse, just drag your window to the side.

★★☆☆☆2020-08-26
Elizabeth Zavala

i still have to do it the old fashion way

★★☆☆☆2018-06-06
Vanessa D'Alessandro

It works 1 out of 4 tries

★★☆☆☆2016-06-14
Christian Sprenger

It just resizes the window. Does not work on full screen.

★★☆☆☆2013-04-27
Ben Caesar

I have four windows open and unfortunately, it resizes two at once or even combines the tabs in two of them, reducing my windows down to three. Sadly seems a bit buggy but may come back sometime in the hope that these issues have been fixed.

★★★☆☆2024-08-09
Ryan Franks

I will change it to 5 once someone tells me how to turn it off, surely just selecting the 1 option ( merge two windows into a maximized window) is not the way, why is there no toggle where you can simply just turn it off once you want to go back to normal.

★★★☆☆2024-05-12
Joseph Carter

woah chromebooks already do it

★★★☆☆2023-11-27
Perfil Que Cresce

Crashing after open. It used to be very good, but now, not working anymore. W11.

★★★☆☆2023-01-01
Christopher D'Lamatter

Great idea but Windows 11 & Mac OS have features like this.

★★★☆☆2022-01-12
rd _o

It is good but you can not pick what tabs if you have at of that's this makes it a 3 stars for me

★★★☆☆2021-07-17
En Es

I love this for the minimalist UI but unfortunately it ungroups all my tab groups so I'll have to uninstall..

★★★☆☆2021-02-06
HIMANSHU GOYAL

It's indeed helful but on splitting it doesn't keep my tabs group intact. So, when I am splitting I have to go back and put all tabs again into that group.

★★★☆☆2021-01-25
Saurav Singh Bisht (Saurav)

its pretty good actually, but its okay i just want to get stick around with my drag into the side one

★★★☆☆2020-12-16
Byrthe

Great app that serves its purpose. But it sometimes crashes my computer when I want to split my screen

★★★☆☆2020-11-05
Ranjan Dhungel

Isn't this feature done by windows snap feature already ?

★★★☆☆2020-10-24
Paper n Pencil Crafts

Good idea, but you don't need the extension. If you have Windows, you can just use a shortcut: Win + Left Arrow (move tab to left side of screen) Win + Right Arrow (move tab to right side of screen) Win + Down Arrow (move tab to bottom of screen) Over all, its ok.

★★★☆☆2020-10-20
paidcws account

was okay

★★★☆☆2020-08-31
King “Kiing”

This is helpful because its better than making a new window and putting it on one side because you have to constantly click on the other window for it to pop up, but this extension always has the 2 windows popped up the same time. But, there is this annoying problem that every time I use this a couple of time, I click on the extension and its just blank. This is annoying because I have to keep reinstalling it because of this problem. Fix your glitches, please!

★★★☆☆2020-08-07
candra prasetyo

a shortcut to make new window :D

★★★☆☆2020-07-18
Eric Schuetz

Honestly, it isn't all that remarkable. I want a tab that can hold multiple "screens". This is essentially opening two browser windows, and using your split screen feature (at least on Windows). I don't have a modern Chromebook to test this on, nor do I own ANYTHING Apple, so I can't say anything that route. Just not what I am looking for regarding the feature, and ultimately redundant regarding what Windows can already do without the need of an extension.

★★★☆☆2020-01-10
Daniel Sun

LISTEN HERE- THIS EXTENSION IS POINTLESS AND HERES WHY ok look to its credit it does what it says it does. But at the same time its also extremely useless. All this extension does for you is that it resizes your window- something you can EASILY DO on both Mac and windows without the use of a friggin extension. It's actually easier to do it without the extension. All you have to do is drag your window out to the side and it already automatically fills half the screen. This by far is the most convoluted and stupidest way to do an already dumbed down and simple task. ITS NOT ROCKET SCIENCE PEOPLE.

★★★☆☆2018-07-04
David W

It does a decent job, but for whatever reason it stops working on a daily basis. It will start working again when in "manage extensions" mode, just toggle it off, then toggle it back on again.

★★★☆☆2018-03-15
MPE

I love the concept. I love this extension when it consistently works. I do not like, or even love, when (at random) clicking on the dualless extension brings up a blank list versus the usual list of dual monitor options.

★★★☆☆2017-01-21
Rebecca White

+ Can arrange two windows side-by-side - Limited to predefined layouts (see screenshot) - No choice in what windows are resized when running 2+ windows

★★★☆☆2013-09-23
José Horta

Really good application, I don't give it 5* because it resets my pinned tabs to normal tabs. Keep up the good work =)

★★★☆☆2012-11-04
Wayne Bee

A little buggy on the new chromebook. I had to shutdown and restart at one point because Dualless forced minimized everything. Also, it does not recognize the chromebook taskbar which makes side scrolling difficult.

Permissions (2)

Permissions

storage Can store data locally in your browser tabs Can see your open tabs and their URLs

Details

Version 0.4.1
Updated Dec 29, 2023
Size 266KiB
First Seen Mar 29, 2026