Photos from old phones, WhatsApp forwards and screenshots lose detail. The AI model rebuilds edges and texture while it enlarges, so the photo looks clean when printed or shown on a big screen.
Yes, it sharpens faces, text and edges. It does not invent a different face: very blurred photos improve, but cannot become perfect.
Yes, 2× enhancement of images up to 1500 pixels is free. Premium adds 4× and a Max quality model.
No. The AI runs in your browser.