Free tool · runs in your browser
Face Compare: Similarity Test
Do we look alike? Who scores higher? Upload two photos and settle it with measurements. You get a face similarity percentage from the landmark layout of both faces, plus each face's score out of 10 and all eight proportions side by side, so you can see exactly where the two faces match and where they part.
Photo A
Drop, paste or choose a file
Photo B
Drop, paste or choose a file
Add two photos: two people, or the same person twice. Straight-on, whole face visible.
Runs in your browser. Your photos are never uploaded.
How it is measured
Two faces laid over each other, then measured.
Each photo gets 478 landmarks. A small head turn is removed first, so a slightly angled photo is compared as if it were straight-on. For similarity, 80 landmarks that describe the layout of a face (the outline, brows, eye corners and nose) are laid over each other at the same centre, size and rotation, and the average distance between matching points is turned into a percentage. The mouth is left out, so a smile does not make the same face read as a different one. For the scores, each face goes through the same eight-proportion measurement as the face rating tool.
- Similarity
- Average distance between 80 matching landmarks after the two faces are aligned. 100% is the same layout.
- Face score
- The measured 1–10 score from the face rating tool, for each photo.
- Side by side
- Symmetry, golden ratio, thirds, fWHR, midface, canthal tilt, jaw and eye spacing for both faces, with the one closer to its reference band marked.
Measure it yourself
How to get a fair comparison
The tool compares photos, so the photos have to be comparable.
- 1Use two straight-on photos with the whole face visible. Photos turned more than 15° are not measured.
- 2Keep the camera at a similar distance in both. A close selfie widens the nose and narrows the jaw compared with a photo from further back.
- 3Use a neutral expression in both, or the same expression in both.
- 4Pull hair off the forehead if you can, so the hairline is found in both photos.
Skip the ruler: the free tool above does it from one photo in about 30 seconds ↑
What's normal
What the similarity percentage means
Similarity describes geometry: how closely two sets of landmarks line up.
- 80–100%
- Reads as: Almost the same face geometry
- What it means: The outline, eyes, brows and nose sit in nearly the same places. Typical of two photos of one face taken the same way.
- 60–79%
- Reads as: Strong resemblance
- What it means: The overall layout matches, with visible differences in a few areas.
- 40–59%
- Reads as: Some resemblance
- What it means: Parts of the layout match, others clearly do not.
- Under 40%
- Reads as: Different face geometry
- What it means: The outline or the spacing of the features differs across the face.
The percentage compares shapes in two photos. It is not face recognition and not a test of family relationship.
Related tools
Face Rating
The full breakdown for one face.
Photo Rater
Which of your photos is the best one.
PSL Score Test
The same score on the 1–8 PSL scale.
Face Symmetry Test
Symmetry index plus eight left-right readings.
Face Shape Detector
Oval, round, square, heart, diamond or oblong.
Mirror Face Test
Your left half doubled, your right half doubled.
FAQ
Do we look alike?+
Upload a photo of each of you and the tool answers with a number: how closely your landmark layouts match once the two faces are laid over each other. It also shows which proportion you share most and which sets you furthest apart.
How does the face similarity test work?+
Both faces are mapped with 478 landmarks, a small head turn is removed, and 80 points that describe the layout of the face are aligned at the same centre, size and rotation. The average distance left between matching points becomes the similarity percentage.
Who looks better, according to the tool?+
The tool does not judge looks. It gives each face a measured score out of 10: how close eight proportions sit to their reference bands. The higher score means more readings inside those bands in that photo, nothing more. Style, skin, hair and expression are not measured.
Can it tell if two people are related, or the same person?+
No. It compares geometry in two photos and nothing else. Relatives can score low and strangers can score high, and two photos of one person can differ when the lens or the pose changes.
Can I compare two photos of myself?+
Yes. It is a quick way to see how much a lens, a distance or an angle changes your face on camera, or to compare a before and an after photo taken the same way.
Why did it refuse one of my photos?+
Either no face was found, or the head is turned too far to measure. Use a straight-on photo with the whole face visible and even light.
Are my photos uploaded?+
No. The face model runs in your browser, and neither photo leaves your device.
One reading here.
Nineteen in the app.
A controlled scan, every reading against its ideal band, bone vs trainable, a plan, and a 3D model on Face ID iPhones.