Tool
Canthal tilt test
Measure the three most-argued facial proportions right in your browser: canthal tilt, facial thirds, and midface ratio. Tap a few landmarks on your photo and the geometry runs locally — the photo is never uploaded, stored, or sent anywhere.
The photo stays in your browser. Nothing is uploaded, stored, or sent anywhere.
How to get a cleaner measurement
Use a photo taken straight-on, head level, from at least arm's length — a close-range selfie's wide-angle lens warps every ratio on your face. Zoom your screen in when placing points. The same face will produce slightly different numbers across three photos; that's measurement error, not your face changing. The tilt calculation uses the line between your two inner eye corners as the horizontal reference, so a slightly tilted head in the photo doesn't corrupt the angle.
What these numbers actually weigh in a first impression
Less than the forums say. Thin-slicing research (Willis & Todorov, 2006) shows first-glance judgment is holistic — the brain reads the whole-face combination in about 100 milliseconds rather than auditing eye angles item by item. Individual metrics are useful for explaining why a face reads the way it does, not for deciding it. A neutral-tilt face can still pull a strong first-glance read on midface, jawline, and skin — and the reverse holds too.
Frequently asked questions
Is the photo really never uploaded?
Really. The tool loads your photo with the browser's FileReader and every calculation is in-page geometry — no network request carries image data. You can verify with the Network panel in your browser's developer tools.
How accurate is the canthal tilt measurement?
Hand-placed landmarks carry ±1-2° of inherent error, plus whatever the camera angle and lens distortion add. Use it as a range estimate (negative / neutral / positive) rather than arguing over decimals. For a steadier read, measure several photos and take the trend.
What counts as positive vs negative tilt?
Outer corner higher than the inner corner is positive canthal tilt; lower is negative. The community narrative prizes positive tilt, but its real first-impression weight is smaller than the discussion volume suggests — the whole-face combination matters far more than any single angle.
Do facial thirds have to be equal?
The classical canon says roughly equal, but plenty of faces rated highly in practice deviate from it. Treat a measured imbalance as information about your facial structure, not as an error that needs fixing.
No single metric explains a first impression — the combination does
1 minute. The AI reads your full photo — face, physique, outfit, vibe — against first-impression data and writes the actual read, your ceiling, and the plan.
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