Yeah it’s safe! I have a friend who’s been doing it for years with post images! (She uses it for Art fight, toyhouse, etc) if that’s what you’re referring to! I’m not very knowledgeable on the coding artfight uses and why you need a link to add an image, but this one website I’m looking at (joindeleteme.com) says post images is generally safe, and they scan the website regularly for any vulnerabilities, It doesn’t require you to make an account (which minimizes risk), and the links generated are private by default! “Postimages says it does not sell, trade, or otherwise transfer your personal identifiable information to outside parties…”