One guy I talked to for awhile was threatening me to post my pictures online

Still can contact him?

Since you live in different countries, you are going to have to find someone intelligent you trust who can sweep him off his feet, get his private information and collect things against him.

Leave him no choice but to delete the pictures.

I would do it if it happened to any of my siblings. Not that we haven't discussed and agreed inappropriate pictures should never be sent online.

I am not sure about your age. Possession of minors' sexual pictures has legal consequences no matter the country.

This is why you do not send nudes to people online...honestly, I do not get why people do this and never think of the conquences. That being said report him,as others have said it is illegal to publish them withour your permission to do so.
However ,if you do so on a website the site maybe able to exbit them on the site. FB does not allow nudity,but any pics you post publically there can be shown by FB.
I am not sure about sites that allow nudity,but again never wise to post anything on a public site you would not want the whole world to see.

Could people please show her a bit of support instead of playing the 'blame game'? She's clearly worried and upset by this

Maybe a lesson learned don’t share pic online

stop contact with him. He's just some psycho screwing with you because he can. Did he ask if you wanted to role play as a blackmail victim? If not, then he's just an abusive fuck

Seems like you met an @ just like the one I just communicated with.

What do you mean he was role playing? Is he still threatening you with posting the pics online?

Are they 'private' pictures?

Your own fault. Tbh.

Remove the pics n all he has is the sw logo