When a swap does not land, it is almost always one of a short list of causes — and most are in the photo or the clip, not the tool. Here is what to check, roughly in order of how often it is the culprit.
A source photo taken from the side or below gives the model little to work with. Use one facing the camera. This is the single most common fix.
A shadow across half the face hides information the swap needs. A flatly, evenly lit photo swaps far more cleanly than a dramatic one.
The eyes matter. Dark glasses or a fringe over the face leave the model guessing, and guesses look wrong. Pick a photo with the face clear.
With several faces in the source, the tool may lock onto the wrong one. Crop to just the person you want first.
A tiny or soft face has too little detail to rebuild from. A clear, reasonably close head-shot is worth more than any setting.
Motion blur and quick head turns are hard for any swap. Choose a clip where the face is reasonably steady and in focus.
If the person in the video turns to a sharp profile or looks right down, the swap has to invent a view it never saw. Front-on stretches swap best.
Swapping a heavily bearded face onto a clean-shaven one, or the reverse, asks the model to reconcile two different jaw textures. It still works, but a closer match between source and target looks cleaner.
Yes — swap one person in a crowd, or put different faces on different people. How multi-face swapping works and when to use it.
Your face is personal. Exactly what we store, for how long, and the 24-hour rule that deletes everything you upload and everything you make.
Making a face swap for Instagram Reels or YouTube Shorts? The clip choices and formats that swap cleanly and post well.