Okay so what I do occasionally when I want to strip all formatting is to paste it into the url bar (I press alt-d to take me there and then control-v) and then copy it from there (alt-d again and control-c) and then paste it into its destination.
It sounds like a bunch of steps but once you get used to it it's really not so much.
Note that it may ruin the wordle boxes, I haven't tried it with that.