I know Kdiff3 can do diff from clipboard but only 2-way.
Is there a tool that allow me copy&paste three text and compare it? Now I have to create three files with the text I copied and compare them. After I delete them.
Can't be online tool.
You can create a 3-way diff using Meld from the clipboard without writing to files by creating a new file comparison, checking the "3-way comparison" option, and choosing "Blank comparison". Then simply paste in the three items.