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9 sliders · photos and videos · one face or everyone

Change Facial Expression with AI: Add a Smile, Open the Eyes, Fix the Look

The best photo of the day, and one person is frowning into the sun. The take where everything worked except a glance away from the lens. Face Studio’s Expression edit fixes moments like these with nine sliders — smile, eyes, mouth, eyebrows, three head movements and two for the gaze — on a photo or a video, for one face or everyone in it. Move a slider, compare the result with the original, and keep it.

Change an expression in Face StudioTry the age filter
  • Finding people is free
  • Up to 8 people, you pick who
  • AI-edited label on every result
Meera4 of 10 photos
Kabir6 of 10 photos
  • Swap
  • Enhance
  • Age
  • Expression
  • Lip sync

Meera → Person 2 · Kabir → Person 1

Illustration with fictional characters: pairing faces to people, as in Face Studio. Not a swap result.
  • SwapYour face onto the person you pick
  • EnhanceSharpen a soft or low-light face
  • AgeYounger or older, one slider
  • Expression9 sliders: smile, brows, eyes
  • Lip syncA video says the audio you give it

The 9 expression sliders

Each slider moves one feature either way from where it is now. Leave a slider in the middle and that feature is left alone.

  • Smile

    From a frown to a smile — the one most people come for.

  • Eyes

    From closed to wide open.

  • Mouth

    From closed to open.

  • Eyebrows

    Down for a serious look, raised for surprise.

  • Turn the head

    To the left or to the right.

  • Nod the head

    Down or up.

  • Tilt the head

    Towards one shoulder or the other.

  • Look sideways

    Move the gaze to the left or the right.

  • Look up or down

    Move the gaze up or down — back towards the lens, for instance.

How to change a facial expression in a photo

Five steps, the same for a video.

  1. Choose Expression and add the picture

    Upload a photo or a video, or paste a link to a video you made or have permission to use.

  2. Pick the face

    Up to 8 people are found. Tap the one to change, or leave nobody picked to change every face the same way.

  3. Move a slider

    Start with one, usually Smile or Eyes. Combine a few for a whole new expression; Reset every slider takes you back to the start.

  4. Preview a frame

    On a video, preview one frame before you change the whole clip.

  5. Compare and keep

    Drag the before-and-after slider across the face, then download or share the result.

Fix the group photo

The classic job: six people, one good shot, and one of them not smiling or looking away. Pick only that person, nudge Smile or the gaze, and leave everyone else exactly as they were.

If someone’s eyes are fully shut, the Eyes slider has little to work with and the result may not convince. Then the better route is Swap: save that person’s face from another photo of the same moment and swap it in — with their permission.

More reasons to change an expression

Small fixes, mostly — the kind a reshoot would cost far more than.

  • A friendlier profile photo

    A touch more smile on a photo you otherwise like.

  • Eyes on the camera

    Bring a sideways glance back towards the lens with the two gaze sliders.

  • A reaction shot

    Raise the brows, open the mouth, turn the head — a surprised face of your own for a meme or a Short.

  • Direct a scene after the shoot

    Adjust an actor’s expression in a clip of your short film, with the actor’s agreement.

Tips for a believable expression

Expressions look most real when the change is modest.

  • Small moves first

    A slight change usually reads as natural; the extremes can look stretched.

  • Smile with the eyes too

    A real smile shows in the eyes as well, so a little Eyes with a little Smile often beats a lot of Smile alone.

  • Mind the size

    Use a picture at least 256 pixels on its shorter side, with the face reasonably large and sharp.

  • Sharpen, then edit

    A soft or noisy face? Run Enhance first, then change the expression on the sharper copy.

The same rules as every face edit

Expression follows Face Studio’s terms: your own face, an adult who gave you permission, or a face that is not a real person. The terms forbid sexual content and using an edit to deceive, and faces that appear to be minors are refused.

Every result carries an invisible watermark and a C2PA content credential saying it was edited with AI. A run that fails or is blocked costs nothing.

Questions

Yes. Face Studio’s Expression edit has 9 sliders — smile, eyes, mouth, eyebrows, three for the head and two for the gaze — and works on photos and videos.

More from Face Studio and FloStudio

Pick the face. Pick the person. Check it before you commit.

Sign in to start. Finding the faces in a photo or video is free.

Change an expression in Face StudioTry the age filter