Powered by face-api.js — 7-emotion neural classification

AI Face Emotion Detector

Upload a photo and discover exactly what emotion your face is expressing — with a full confidence breakdown across all 7 emotions, completely free.

100% Private & Secure Runs Entirely in Browser No Account Needed

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For best results: face the camera, ensure good lighting, and use a natural expression.

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100% In-Browser AI. Photos never leave your device.

How AI Reads Facial Expressions

Three steps from pixel values to psychological affect classification.

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1. Micro-Movement Mapping

The convolutional neural net scans 68 landmark coordinates across the brows, eyes, and mouth.

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2. Action Unit Scoring

It calculates muscle contraction vectors based on the Facial Action Coding System (FACS).

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3. Probability Distribution

A softmax layer generates a 100% probability curve across all 7 universal emotions.

Why Analyze Facial Emotions?

Micro-expressions convey subconscious feelings faster than words.

Acting & Modeling Feedback

Test whether your portrait conveys the intended emotion or intensity.

Social Media Optimization

Choose profile pictures that project approachable, genuine positivity.

Private On-Device AI

Runs locally in your browser via WebAssembly without uploading images to cloud servers.

The 7 Basic Emotions — Explained

😊

Happy

Radiating joy, warmth, and positivity. The AI detected raised cheek muscles and smile contours around the lips.

😢

Sad

Reflective, downcast, or melancholic. Detected through downward lip corners and tension in the inner brow.

😠

Angry

Intense, assertive, or frustrated. Detected through furrowed brows, tightened eyelids, and narrowed lips.

😲

Surprised

Wonder, shock, or sudden realization. Indicated by widened eyes, raised arches, and an open jaw.

😨

Fearful

Alert, apprehensive, or startled. Marked by pulled-back lips and raised, drawn-together brows.

🤢

Disgusted

Aversion or distaste. Indicated by a wrinkled nose bridge, raised upper lip, and squinted eyes.

😐

Neutral

Calm, composed, and objective. Relaxed facial musculature with no dominant emotional tension.

What Our AI Emotion Detector Measures & How It Works

Human facial expressions are produced by coordinated contractions of subcutaneous muscles around the eyebrows, eyelids, nose bridge, cheeks, and lips — documented in psychology as the Facial Action Coding System (FACS). Our AI Emotion Detector runs a two-stage neural pipeline inside your browser using face-api.js (TensorFlow.js with WebGL/WebAssembly): first, SSD MobileNet v1 locates the face and maps 68 facial landmarks to align the eyes and mouth horizontally; second, a depthwise separable convolutional expression network evaluates muscle tension patterns across the aligned face crop.

Rather than outputting a single rigid label, the model computes a softmax probability distribution across all 7 universal emotions: Happy (cheek raiser + lip corner puller), Sad (inner brow raiser + lip corner depressor), Angry (brow lowerer + lid tightener), Surprised (outer brow raiser + jaw drop), Fearful (brow raiser + upper lid raiser + lip stretcher), Disgusted (nose wrinkler + upper lip raiser), and Neutral (relaxed baseline musculature). This lets you inspect both your dominant expression and subtle secondary undertones in any portrait.

Tips for the Best Expression Analysis Result

  • Keep Brows & Mouth Clearly Visible: Heavy bangs covering the eyebrows or hands near the chin hide key action units that distinguish surprise, anger, and sadness.
  • Avoid Extreme Side Profiles: The 68-landmark alignment works best when both eyes and both corners of the mouth are visible to the camera.
  • Use Even Front Illumination: Strong shadows across the eyes can be misread by the convolutional layers as furrowed brows or squinting.
  • Compare Genuine vs. Posed Smiles: A genuine Duchenne smile engages both the mouth corners and the orbicularis oculi muscles around the eyes, producing a higher Happy confidence score.

Honest Accuracy & Limitations

Computer vision reads outward facial muscle geometry in a single still frame, not a person's internal emotional state or psychological mood. Resting facial structure, cultural expression norms, camera angle, and lighting contrast can cause a relaxed face to register mild Sad or Angry undertones. All results are provided strictly for informational entertainment, photography feedback, and self-discovery — not psychological or clinical assessment.

100% In-Browser Privacy — Verify It Yourself

Every expression scan runs locally on your device using WebAssembly and WebGL. Verify it yourself: open your browser DevTools (F12), open the Network tab, upload a photo, and see that no image request is ever sent to any server.

Try Our Other Free AI Face Tools

Frequently Asked Questions

Everything you need to know about facial emotion detection.

How accurate is the AI emotion detector?

Powered by a convolutional neural network (CNN) trained on diverse facial expression benchmarks, it evaluates micro-expression markers across the 7 universal human emotions documented by Dr. Paul Ekman.

Can it detect mixed or subtle emotions?

Yes. The breakdown shows percentage scores for all 7 emotions, revealing secondary or subtle undertones.

Is my photo stored?

No. The AI runs 100% in your browser. Your images are immediately wiped from memory after analysis.