Can "No pasa nada" mean "Don't worry about it"?
I've heard it used like this before and I think it can. Just last night I said to Maria "No pasará nada" and she said "Verdad...". I don't even know exactly what I said but it felt right. I was trying to say "It's gonna be cool".
No pasa nada can be translated as ëverything is alright or cool
No pasará nada means nothing is going to happen.
My friends from Madrid use the phrase "No pasa nada" quite frequently. It's a way to say "don't worry" and also a standard response to an apology.
Me: "Lo siento mucho. Disculpame"
Friend: "No pasa nada." (Don't worry. It's OK. Don't worry, I'm not mad. It's not important enough to worry about.)
The Phrasebook equivalent is "no problem". Obviously you can think of other similar expressions like "no sweat" (Australian) but it's late and I'll leave it to you. Certainly "don't worry about it" is on the list.