|Google Play:||Check if it's there|
Your sensitive images should be watermarked before sending to someone to protect against exploitation by unkind or immoral people.
Use it however you want, eg: watermark your passport or id before sending it to someone.
Example, watermark "web:firstname.lastname@example.org@20260609" onto your passport before sending it for register at some website which requires your passport info.
Note that this will reduce info being leaked and possibly knows where it might leaked from the "web" channel which you watermarked but cannot fully prevent someone from re-upload or leaked it, but at least u know it is from "web" channel and maybe on what action("email@example.com") you did from your phone or computer etc.