AI Face Emotion Detector

Detect facial expressions for free in the browser with an open-source ViT ONNX model, preferring WebNN while never uploading images

Category

Image Tools

How to Use

  1. Upload a front-facing portrait, avatar, or expression photo
  2. Choose Auto backend to try WebNN first with WASM fallback
  3. Click Detect Emotion to view happy, neutral, sad, and related probabilities
  4. Use the result as an assistive signal and review important cases manually

Examples

  • Portrait expression pre-check

    Input: Upload a front-facing portrait photo

    Output: Returns happy, neutral, sad, surprise, and related probabilities

  • Free local facial emotion recognition

    Input: You do not want to call a paid Facial Emotion Recognition API

    Output: Runs the model in the browser without uploading the image

FAQ

Is this emotion detector free?
Yes. The model runs locally in your browser without per-run billing; first use downloads about 56.8 MB of open-source ONNX weights.
Can it be used for hiring, risk, or medical decisions?
No. Expression recognition is affected by lighting, pose, occlusion, culture, and training data, so use it only for low-risk assistive workflows.
Is the image uploaded?
No. Decoding, preprocessing, and inference happen locally in the browser.

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