TinEye
Reverse image search to find where a picture appeared online
Freemium
Search Engines
It finds copies, edits, and earlier versions, and sorts by date. Fact-checkers use it to trace the origin of a photo. A browser extension and API are available.
Coverage is limited to images it has indexed, so a lack of matches is not proof of originality.
Google Lens and Yandex Images are alternatives. TinEye suits fact-checkers verifying images.