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AI Rate Face

Canthal Tilt Calculator

Upload a front-facing photo to calculate left, right and average visible canthal tilt. Positive, neutral and negative are geometric direction labels — not ratings — and both eyes are measured in your browser.

Analyze a photo →

Calculate visible canthal tilt

Upload a front-facing photo — the browser measures both eyes locally and displays the exact photo angles.

Photo stays in this browser

Choose one clear adult portrait

Front-facing, neutral expression, even light. JPG, PNG, WebP, HEIC or HEIF up to 10 MB.

or drag and drop it here

Before you analyze

  • 1Use your own photo, or one you have permission to use.
  • 2One adult face only. No minors or age estimation.
  • 3Results describe this photo, not objective beauty or health.

A typical first run loads about 15 MB of model/runtime files, then the browser caches them. Nothing is submitted to our analysis API.

Your photo and landmarks stay in page memory and are cleared when you reset or leave. Face-shape tools keep a small result summary in this tab for up to 30 minutes so you can continue to hairstyles or glasses. Clear the result to remove it.

Drag to reposition

Adjust the face area

Keep one full face inside the oval. Leave the hairline and chin visible, with a little space around the head.

For more reliable detection

  • • Select only one adult when the photo contains several people.
  • • Avoid cutting through the forehead, chin or either side of the face.
  • • Cropping helps framing, but cannot restore blur or very low resolution.

The crop is created in this browser and is never uploaded.

Evidence behind this result

The output is built from inspectable photo geometry and a separate image-quality signal.

01

Two eye angles

Measures each outer corner relative to its corresponding inner corner.

02

Average direction

Labels averages above +2° positive, between −2° and +2° neutral, and below −2° negative.

03

Agreement

Shows whether pose or natural difference produces unequal photo angles.

How this tool works

  1. 1. Locate

    Inner and outer corner landmarks are detected for both eyes.

  2. 2. Correct

    The calculation uses image-pixel coordinates and reports eye-line roll separately.

  3. 3. Classify

    The average is assigned a plainly defined directional band.

Read the methodology →References and limitations →

What the result cannot tell you

01

Canthal tilt in a photograph is affected by head roll, yaw, lens distortion and expression.

02

The result is not a clinical measurement and cannot assess eyelid function or eye health.

03

Positive, neutral and negative describe direction only; none is inherently better.

About this tool

How local processing works →
What is positive canthal tilt?+

In this calculator it means the visible outer eye corner is more than 2° higher than the inner corner.

Why are my two eyes different?+

Natural asymmetry is common, and even small head rotation can make the photo angles differ.

Can this diagnose an eye condition?+

No. It is a non-medical photo geometry tool.

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