PxBee (https://www.pxbee.com/) allows photo editing with AI.

Several tools available: erasing objects, people or watermarks, extending an image beyond its edges, generative fill, replacing elements.

Sharpness and resolution improvement unconvincing.
AI models used not specified.

Export JPG or PNG.

Free, without an account. Quotas announced but not detailed: during the tests, passage with accounts after about ten generations but still without quotas. Account allows history.

Note: the deletion and background change tools announce a use without registration.

Sources for testing:

• https://commons.wikimedia.org/wiki/File:Oregon_National_Historic_Trail_in_Wyoming.jpg
• https://commons.wikimedia.org/wiki/File:Violet-backed_starling_(Cinnyricinclus_leucogaster_verreauxi)_female.jpg
• https://commons.wikimedia.org/wiki/File:Hoverfly_October_2007-21.jpg