Yes indeed. there are tools to mark paper in braille, just as there are pens. although I think the majority of blind people would type, or use tools like Siri to dictate, than hand-braille nowadays.
I'm in my 30s and learned braille from the age of 3, and I only ever braille by hand for short things: labels, notes, birthday/get-well/good-luck cards, etc. I'd choose to type reports for work, essays for study etc.

Not to be a jerk, but how would someone write in Braille? I went blind later in life and never learned Braille. I’m just wondering is there a tool that creates the Braille so you can read it later?

Yes, a blind person could keep a braille journal. Many would probably prefer to type their thoughts today, though I've heard that, at least in the past, some blind people had a tape recorder and made a kind of monologue.