Face Symmetry Test: How Even Are the Two Sides of Your Face?
Check how evenly the left and right sides of your face match. Free, from one photo, and the photo stays on your device.
- Photo stays on your device
- No sign-up
- Free, no limit
Add a front-facing photo
JPG, PNG or WebP · up to 10 MB · one face, looking straight ahead
- Your photo never leaves your device.
- For adults 18+.
Loading the face model (about 6 MB, once)…
Your result shows up here
A PSL range, three geometry scores, your eye type and the lines we measured.
By the numbers
- face points found in your browser
- 478
- ratios and angles measured
- 22
- people rated the faces our ranges come from
- 2,513
- photos sent to a server
- 0
Typical ranges
Typical ranges we compare you with
From 101 adult faces rated by 2,513 people (Face Research Lab London Set). Where men and women differ, both ranges are shown; you choose which one applies.
| Measurement | Typical range | Centre | What it is |
|---|---|---|---|
| Asymmetry index | 0.007–0.032 | 0.015 | Mean mirrored deviation of paired points, as a share of face width; lower is more symmetric. |
How it works
Three steps, about a minute
Step 1: Add a photo
Upload a front-facing photo or use your camera: good light, neutral face, lips closed.
Step 2: Get measured
Your browser places 478 points on your face and computes the measurement on the spot.
Step 3: Read your number
See your value next to the typical range, with the lines drawn on your photo.
What it measures
How we measure symmetry
- Paired points
- Each point on one side of your face has a twin on the other side: eye corners, brow ends, nostrils, mouth corners, jaw outline. We mirror one side across the face's centre line and measure how far the twins land apart.
- One number
- The asymmetry index is the average of those gaps as a share of face width. Lower means more symmetric.
- Typical range
- On the rated faces we calibrated with, most values fall between about 0.007 and 0.032. Nobody scores zero.
- Why it matters a little
- Studies link symmetry to attractiveness only weakly. Small asymmetries are normal and often unnoticeable.
Photo tips
Take a photo that measures well
- Face the light
- Stand facing a window or a lamp so both sides of your face are lit evenly. Light from one side or from above throws shadows that shift where the jaw, nose and eye corners appear, and a dark photo is rejected.
- Hold the camera at arm's length
- A phone held close to the face widens the nose and the middle of the face. Hold it at arm's length or prop it up a little further away, then crop if you need to. The ratios do not depend on how big your face is in the frame.
- Keep your head level
- Put the camera at eye level and look straight into the lens. A raised chin shortens the lower face and a lowered chin lengthens it. The test rejects photos with too much tilt or turn, so you will see a hint if this happens.
- Neutral face, lips closed
- Smiling lifts the cheeks and changes the mouth, eye and jaw measurements. Use a relaxed expression with your lips together and your eyes open as they normally are.
- Show the whole face
- Keep your full face in the frame from forehead to chin, push hair away from the jawline and take off glasses. Hats, hands and heavy filters hide the points the test needs.
- Compare two or three photos
- Every photo is a little different. Take a few in the same spot and look at the range they give you rather than trusting a single result.
Privacy and accuracy
What happens to your photo
Your photo stays on your device
The free test runs inside your browser. Your photo is not uploaded, stored or sent to anyone, and we keep no copy of your scores.
How far to trust the numbers
Lighting, lens distance, head angle and expression all shift facial ratios. Take two or three photos and compare. The typical ranges and the 1–8 scale are set from 101 adult faces that 2,513 people rated for attractiveness (Face Research Lab London Set, DeBruine & Jones 2017, CC BY 4.0). On those faces the geometry score agrees with the ratings only in part, because proportions are only part of attractiveness.
Photos exaggerate asymmetry
A slight head turn, uneven light or one-sided smile makes a face look less symmetric than it is. Retake a level, evenly lit photo before reading much into the number.
More free tests
Run another free test
All measurements, PSL range and eye type in one go.
The angle of each eye, corner to corner.
Facial width-to-height ratio.
Middle versus lower third of the face.
Pupil distance against midface height.
Face length to width, next to 1.618.
Want to understand the number? Read the facial symmetry measurement reference for the formula, reproducible coordinate cases, and photo limitations.
FAQ
Questions people ask
- Is my face symmetrical?
- No face is perfectly symmetrical. If your index sits inside the typical range, your face is about as symmetric as most of the rated adults.
- Why does my face look different in selfies?
- Front cameras often mirror the image and the lens is close, which widens the nearest features. Mirroring does not change the symmetry index, but distance and angle do.
- Does a mirrored face test show symmetry?
- Mirror-half images exaggerate small differences and change how a face looks. We measure the points directly instead of making mirrored faces.
Ready when you are
One photo, about a minute, nothing uploaded.