wordpress - How can I prevent third party websites from using my images?

Solution:

Preventing hotlinking is doable, and there are a few options.

Hotlinking is the act of linking to a file that is hosted on another site, instead of downloading the file, hosting it on your own server, and providing proper citation. Images are most frequently hotlinked, but audio files, movies, flash animations, and other digital assets can also be hotlinked.

Source: https://blog.hubspot.com/website/hotlinking