Brow Line
Marks where the upper-face measurement begins.
Free AI Tool — Visual Proportion Overlay
Golden Ratio Phi-Mask
A phi-mask tool is an AI tool that locates the landmarks around your brow, nose, mouth, and chin, draws four horizontal lines between them, then overlays that grid directly on your photo — so the classical proportions everyone talks about become something you can look at instead of just a set of numbers.
What would a face built entirely on 1.618 look like next to yours? Upload a photo and the grid answers that visually, drawn from your own landmarks rather than a stencil borrowed from anyone else's face.
Drawn on
your photo
your photo
Never stored,
always private
always private
2 free scans
daily, no sign-up
daily, no sign-up
1 Upload Your Photo
Drawing the grid…
AI analysis in progress
2 Your Phi Grid
Your photo will appear on the left with the phi grid drawn over it.
Share your result
What the Grid Shows
Four horizontal lines get drawn across your photo, and every one of them comes from a landmark your own face supplied — nothing here is a fixed template stretched to fit.
Nose Base
The split between the middle third of your face and the lower third.
Mouth Line
The line the lower-face golden split runs against.
Chin Line
Where every vertical measurement on the grid ends.
A phi mask, at its core, is just a diagram: lines and rectangles proportioned to roughly 1.618 to 1, laid over a face. Painters and architects have leaned on some version of it for a couple thousand years to plan compositions; beauty marketing picked it up much more recently, with a lot less rigor behind the claim.
This version breaks from the printed diagrams in art textbooks in one specific way — the four lines are placed from your own 68 detected landmarks rather than a fixed overlay resized to fit whatever face lands on it. Tilt your head, change the photo, and the lines move with you, because they're reading your structure rather than tracing a stencil over it.
Treat it as the companion to the Golden Ratio Analyzer: that tool hands you three ratios and their distance from 1.618. This page shows the actual segments those ratios came from, drawn right onto your face.
What the Lines Mark
Three sections sit between the four lines, and they don't carry equal amounts of variation — some move a lot from face to face, one barely moves at all.
Brow to Nose
Upper Section
The span running from your brow line down to your nose base.
Nose to Mouth
Middle Section
The shortest of the three, and usually the steadiest across different faces.
Mouth to Chin
Lower Section
Where most of the difference between faces tends to concentrate — jaw length and chin shape both live in this stretch.
A rectangle built at exactly 1.618 to 1 would put these three sections at precise ratios to one another. Real faces rarely line up that cleanly, and the size of that gap is exactly what the numeric tool next door is measuring.
Getting the Grid
to Land Right
Every one of the four lines is horizontal by design, so a single tilted photo throws all four off at once — not just the section closest to the tilt.
Camera at Eye Level
Shooting from above or below compresses the vertical gaps the whole grid depends on.
Head Straight
A tilted head rotates the entire grid off true, not just one line of it.
Hair Off Your Brow
The brow line anchors the top of the grid. Bangs or a hat covering it leave the model with nothing to measure from.
Closed Mouth
An open mouth pulls the mouth and chin lines apart, stretching the lower section past its resting length.
A plain front-facing shot — closed mouth, clear forehead, camera held level — gives the four lines the best chance of landing exactly where your proportions sit.
How It Works
1
Upload a Photo
One clear, front-facing shot beats an angled or heavily styled one.
2
Points Get Located
The model finds your brow, nose base, mouth, and chin among the 68 landmark points it maps on every face it reads.
3
Grid Gets Drawn
Four horizontal lines connect those points directly on your photo.
4
Compare
See where your own sections land, then check the exact distance from 1.618 on the Golden Ratio Analyzer if you want the numbers behind the picture.
Why Choose
FaceShapesAI?
Advanced AI technology combined with beauty science to give you the most accurate results.
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Trained on millions of faces for high accuracy.
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Your photos are never stored. 100% secure & private.
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Simple, easy-to-use interface for everyone.
Works for Everyone
Our AI works for all genders, ages, and ethnicities.
What a Phi Mask Actually Is
Strip it down and a phi mask is a set of lines and rectangles proportioned to roughly 1.618 to 1. Laid over any face, it marks where features would sit if that face were built entirely on that single ratio. As a drawing aid it earns its keep, and as a piece of design history it's old — easily a couple thousand years, depending on which version you're counting from.
What it was never built to be is a target. The idea that a face measuring closer to the mask is automatically more attractive gets repeated so often it starts to sound settled — it isn't. Every time it's been tested rigorously, it falls apart, because faces vary enormously and so does what people find appealing in them. Picture two results: one measuring 0.02 from phi, another measuring 0.19. Neither number predicts which face someone finds more striking in a photo.
Why This Grid Starts at Your Brow
Most phi-mask diagrams floating around online start at the hairline. This one can't, and the reason traces back to how the underlying model was built: the 68-point landmark standard has no hairline point at all.
Hairlines recede, get covered by hats or a fringe, and shift with a single haircut in ways a jawline or brow line never does — so the model was never trained to find one in the first place. Estimating a hairline anyway would produce a line that looks confident on screen while really being a guess dressed up as measurement. Starting at the brow instead means every line on the grid is something the model measured, not something it approximated.
Using It Alongside the Numbers
The Golden Ratio Analyzer hands back three ratios and how far each one sits from 1.618. On its own, a figure like 1.52 or 1.71 doesn't tell you much about what's driving it — you'd need to picture the section behind that number yourself.
That's the gap this grid closes. Pull up both tools side by side: if your lower-face ratio came back furthest from phi, the grid usually makes the reason obvious at a glance — the mouth-to-chin section will visibly run long or short next to the two sections above it, with no extra explanation required.
About This Tool
The landmark detection and grid-drawing behind this page run on a model Ahsan Fayyaz trained in-house on real faces and benchmarked against other proportion-analysis tools — never a licensed third-party API. It's the same detection engine that powers every measurement tool on the site. It's built for entertainment and informational purposes only, not medical, clinical, or professional advice of any kind.
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Golden Ratio Proportions
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Golden Ratio Phi-Mask
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Got Questions?
Frequently Asked Questions
Four horizontal lines — brow, nose base, mouth, and chin — placed from your own detected landmarks and overlaid on your uploaded photo.
That tool gives you three ratios as numbers and how far each sits from 1.618. This one draws the actual lines those ratios are measured between, directly on your face, so you can see the sections instead of just reading figures.
The 68-point landmark standard the model uses has no hairline point. Hairlines recede, get covered, and change with a haircut, so the model was never trained to locate one — the brow is the highest point it can measure with confidence.
No. That claim gets repeated often, but it hasn't held up under real testing. Faces vary enormously, and so does what people find appealing — the grid describes geometry, not a verdict.
Your photo is processed by our own model, not a third-party service, and deleted from the server right after your grid is drawn. What appears on screen afterward sits only in your browser's cache; refresh the page and it's gone for good, on both ends.
Two a day, no account required.
Yes, and it affects all four lines at once rather than just one. Because every line is horizontal by design, a tilted head rotates the entire grid off true, not just the section nearest the tilt.
The brow line anchors the top of the grid, so hair, a hat, or heavy bangs covering it leave the model without a clear point to measure from — push your hair back before shooting.
Yes. It pulls the mouth and chin lines apart, stretching the lower section beyond its resting length. A relaxed, closed-mouth expression holds the section closest to how your face sits normally.
No — that's the point of drawing them. The upper, middle, and lower sections vary in length from face to face; the middle section tends to move the least, and the lower section usually carries the most variation.
It's the golden ratio, sometimes called phi — a proportion long used in art and design. A phi mask is built entirely around lines and rectangles at that ratio, laid over a face for comparison.
It wasn't built for that. The grid marks proportion lines for comparison purposes, not application points for makeup — treat it as an analysis tool, not a tutorial.
Usually. A filter that reshapes your jaw, nose, or mouth shifts the landmarks the model reads, which moves the lines drawn from them. An unedited photo gives the truest read of your actual proportions.
Small shifts in angle, lighting, or expression can nudge the lines slightly, but the underlying structure stays put. Two clean, front-facing photos of the same face tend to land within a hair of the same grid.
The lower section, from mouth to chin. Jaw length and chin shape both concentrate there, while the middle section — nose to mouth — tends to stay comparatively steady.
No. Two free scans a day work without signing up; creating a free account raises the daily limit if you want more.
Yes — a finished scan can be shared as a styled image, no separate screenshot needed.
No. It's built for entertainment and informational purposes only, not a medical, clinical, or professional assessment of your face.
They're a visual shorthand for the ratio itself — each rectangle's sides sit at roughly 1.618 to 1, so the shape of the rectangle is the ratio made visible, rather than an abstract number.
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