Spanpaper
Generate a wallpaper that flows cleanly across multiple monitors, even when they have different resolutions, scaling factors, physical sizes, or sit at slightly different heights on your desk.

Transformed by spanpaper

Applied on my setup (I Need to buy monitors with matching colors...)
Pick your platform
The setup differs a bit per OS and desktop environment. Pick yours to open the configurator with the right instructions.
About
Everything happens in your browser, your images never leave your device. The setups are saved locally in your browser.
If you are intrested in how this works, check out the github link down below. Its a python script that does the exact same the Linux X11 varaints do. I plan to add the windows version there as well sometime..., windows handles scaling a bit different so the python script wont work on windows yet.
View on GitHub