Goal: extending the screen of a laptop on another laptop.

I'm looking for an alternative free software to spacedesk in order to connect two laptops (the first one with windows 10, the second one with windows 7).

So far I found deskreen, but it requires a HDMI dummy plug.

  • 1
    We will need much more information to give good recommendations here – asking for "a tool like X" is never giving enough details, even if linked. You should always list your requirements explicitly. Please see How to ask for an alternative to some software and the questions linked to it for details. Especially missing: what features do you need, how much may it cost? And btw, I'm using Deskreen. It also works without a HDMI dummy – you then just cannot use it to extend your desktop.
    – Izzy
    Sep 24, 2021 at 0:18
  • Ah, so it's about extending the desktop. What's the problem with the HDMI dummy? Btw, I'm using Deskreen with a Displayport dummy (works fine), and there are also dummies for DVI and VGA. Coming around 5-6 bucks, they are quite affordable.
    – Izzy
    Sep 24, 2021 at 22:09
  • @Izzy I prefer to avoid to buy a HDMI dummy Sep 25, 2021 at 6:47
  • I've read it can be done software-based, but that would require quite a lot of effort. And not sure about Windows, as that was said about Linux. You could try finding a solution to emulate a monitor via software, so that emulated monitor could be used by Deskreen. Maybe this approach on our sister site can help you with that? No additional soft- or hardware needed.
    – Izzy
    Sep 25, 2021 at 10:37

1 Answer 1


My go-to recommendation for that kind of use case is barrier - which is an open-source fork of Synergy. Barrier allows you to drive two computers from one keyboard/mouse set. I highly encourage you to test it.

  • Hello @Riduidel thank you for your answer. My goal is not to control 2 laptops with a single keyboard and a single mouse (like the software mouse without borders), but to extend the screen of one laptop on the other one Sep 23, 2021 at 14:40

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