Mask the hand, describe how it should look, and the model redraws it in the same style, lighting and scale as the rest of the image.
Hands are the one thing image generators still get wrong: extra fingers, fused knuckles, a thumb on the wrong side. Regenerating the whole picture to fix them usually loses everything else you liked, which is why the fix belongs in an editor, not in another generation.
Selecting only the hand and giving an explicit instruction — how many fingers, which way they point, what they are holding — constrains the model to a small region. Everything outside the selection is preserved byte for byte, so the face, clothing and background survive the repair.
Upload the image: Works on AI-generated pictures, paintings and ordinary photographs alike. HEIC, JPG, PNG and WebP are all accepted.
Paint over the hand: Brush across the whole hand and a little of the wrist. Including the wrist gives the model the anatomy cue it needs to attach the hand correctly.
Describe the correct hand: Be literal: 'anatomically correct hand, five fingers, relaxed, holding the glass, same skin tone and painting style'. Naming the style keeps an illustration from turning photographic.
Only the selection changes: Pixels outside your mask are untouched, so a single bad hand never costs you the rest of the picture.
Matches the source style: Because it edits in place, the repaired hand inherits the lighting, grain and brushwork already in the image.
Cheap to iterate: 5 credits per attempt and your prompt stays in the box, so you can adjust the wording rather than start over.
Why do AI images get hands wrong? Hands appear in training data at thousands of angles with fingers overlapping each other, so the model learns a fuzzy average rather than a fixed structure. Constraining it to one masked region with an explicit instruction removes most of the guesswork.
Can I fix hands for free? Signed-in accounts get 10 free credits every day, and new users can try Pro free for 24 hours — cancel anytime.
Does it work on drawings and paintings? Yes. Mention the medium in your prompt — 'oil painting style, same brushwork' — and the repair blends into the existing artwork.
What if the first attempt is still wrong? Re-run with a tighter mask and a more specific instruction, such as the number of visible fingers and what the hand is doing. Small, literal prompts beat long descriptive ones.