Face Shape Detector Online: Discover Your Face Shape from a Photo, Free

CodexFuse Team · 2026-10-29T10:24:17.523Z · 8 min read min read

Upload a clear front-facing photo and let AI tell you whether your face is oval, round, square, heart, diamond, oblong or triangle — free, in seconds.

A face shape detector is a free AI tool that analyses a front-facing photo and tells you your face shape — oval, round, square, heart, diamond, oblong or triangle — in seconds. Instead of guessing from a mirror, you upload a clear photo and get a measurement-based result you can actually use when choosing a haircut, glasses or beard style.

Most people pick a hairstyle from someone else's photo, then wonder why it looks different on them. The missing piece is usually face shape.

How Does a Face Shape Detector Work?

The tool analyses a front-facing photo by mapping facial landmarks — the hairline, cheekbones, jawline and chin — then compares measurements such as face length, forehead width, cheekbone width and jaw width. The ratios between these measurements point to one of seven standard shapes: oval, round, square, heart, diamond, oblong or triangle.

The face shape detector on CodexFuse follows exactly this approach. You upload a photo, the tool detects your facial landmarks, and it returns your shape with the measurements behind the result. No software to install, no manual measuring with a tape across your forehead.

Pro Tip

Pull your hair fully back and remove glasses before uploading. A hidden hairline is the most common reason a detector misreads an oval face as round.

What Are the 7 Face Shapes?

The seven commonly recognised face shapes are oval, round, square, heart, diamond, oblong and triangle. Each one is defined by the balance between face length and the widths of the forehead, cheekbones and jaw — for example, an oval face is longer than it is wide, while a round face has roughly equal length and width with soft angles.

Face shape	Key traits	What it usually means for styling
Oval	Face longer than wide, forehead slightly wider than jaw, softly rounded chin	Most styles work; the challenge is keeping balance, not creating it
Round	Length and width nearly equal, full cheeks, soft jaw angles	Height on top and longer layers add definition
Square	Forehead, cheekbones and jaw nearly equal in width, strong angular jaw	Soft layers and texture soften the jawline
Heart	Wide forehead, narrow pointed chin	Styles that add width near the jaw balance the forehead
Diamond	Narrow forehead and jaw, wide cheekbones	Fringes and chin-length volume balance the cheekbones
Oblong	Noticeably longer than wide, similar widths throughout	Width-adding styles and fringes shorten the visual length
Triangle	Narrow forehead, wide jaw	Volume on top balances a wider jawline

Very few faces match one shape perfectly. If your result feels borderline, the measurements shown alongside it tell you which way you lean.

How Do You Use the Face Shape Detector?

Upload a clear, front-facing photo with your full face visible and a neutral expression, then click Analyze. The tool maps your facial landmarks, measures the key proportions and shows your face shape along with the measurements behind the result — all in a few seconds, free.

The steps on the tool page are simple:

Upload a clear front-facing photo: daylight, facing the camera directly, full face visible.
Click Analyze: the AI detects your facial landmarks and measures the proportions.
Read your result: your face shape plus the measurements it was based on.

One thing to know before you start: the tool asks you to log in or create a free account before use.

A Worked Example: From Photo to Haircut Decision

Fictional scenario — the numbers below illustrate how the tool's output turns into a real decision.

Sara, a 28-year-old teacher, has worn the same long, straight cut for six years and wants a bob — but every bob photo she saves belongs to someone whose face looks nothing like hers. Instead of booking blindly, she opens the face shape detector and uploads a daylight selfie: hair pulled back, no glasses, neutral expression, camera held at eye level.

The result comes back as oval: face length clearly greater than cheekbone width, forehead slightly wider than the jaw, softly rounded chin — the classic oval pattern. She now has a fact, not a feeling, to take to her stylist.

Her decision follows from the result:

Length she chooses: a chin-length bob, since oval faces carry short cuts without needing extra height or width tricks.
What she avoids: a heavy blunt fringe, which would shorten an already balanced face and hide its proportions.
What she asks the stylist for: soft layers around the cheekbones to keep movement, rather than a cut designed to slim or lengthen.

She screenshots the result for the appointment. The stylist adjusts one thing — slightly longer front pieces to frame the jaw — and Sara leaves with a cut chosen for her measurements.

What Can You Do With Your Result?

Haircuts: match the cut to your proportions instead of copying a celebrity photo — length, layers and fringes all follow from the shape.
Glasses and sunglasses: contrast usually flatters, so round faces suit angular frames and square faces suit rounded ones.
Beards and grooming: a beard can add length to a round face or soften a square jaw; knowing the shape tells you which direction to build.
Makeup and contouring: contour placement depends on whether you are balancing a wide forehead, wide cheekbones or a wide jaw.
Photos and portraits: photographers light and angle differently for a heart face than for a diamond one — and if you edit portraits, a background remover or photo enhancer can clean up the shot first.

Stop guessing which haircut suits you — find out in seconds

Upload one clear photo to CodexFuse's free face shape detector and get your real face shape with measurements, so your next haircut, glasses or grooming choice is based on your proportions — not someone else's photo.

Get Started with CodexFuse

What a Face Shape Detector Cannot Do

Honest limits matter here, because a detector looks authoritative and can be misread as a verdict:

It is an estimate, not a professional measurement: results depend on the photo. A tilted head, a smile or a lens held too close can shift the ratios.
It needs a usable photo: angled shots, sunglasses, heavy filters and hair covering the hairline all degrade accuracy. If the result surprises you, retake the photo first.
It does not diagnose anything: face shape is a styling shortcut, not a medical or biometric assessment. It says nothing about health or identity.
It does not pick products for you: it gives you the shape; choosing the exact cut, frame or beard style still needs your taste and, ideally, a stylist's eye.
It requires a free account: unlike some no-signup tools, this one asks you to log in before analysing a photo.

Important

If two photos give you two different shapes, trust the better photo — front-facing, neutral expression, even lighting, hair pulled back — not the first result you got.

The detector wins on convenience, but the mirror still has one job: checking whether the result matches what you see. Use both — the tool for measurement, your eyes for a sanity check.

Running a Salon or Beauty Business? Put the Same Logic on Your Website

If clients keep asking "will this cut suit me?", a salon website that answers that question before the appointment books more chairs than one that just lists prices. CodexFuse is built for exactly this kind of small-business setup, fully managed on credits — no subscriptions, no server babysitting:

Create your free CodexFuse account: one account covers hosting, email and tools.
Add credits only for what you use: pay-as-you-go, so a quiet month costs less than a busy one — no fixed subscription draining you in slow seasons.
Launch managed hosting for your booking site: your site, gallery and booking page stay online without you managing a server.
Set up business email on your own domain: quotes and confirmations come from your salon's name, not a free inbox.
Link the face shape detector in your content: a blog post or service page that sends visitors to the face shape detector turns browsers into booked consultations.

Suggested Reading

If you edit client photos for your portfolio, see how to blur faces in photos for privacy before posting, and how to search for faces across your photo library when a client asks for an old style.

Frequently Asked Questions

Is the face shape detector free?

Yes. The tool is free to use, but you need to log in or create a free CodexFuse account first.

What photo works best?

A clear, front-facing photo with your full face visible, a neutral expression, even lighting and your hair pulled back so the hairline shows. Avoid sunglasses, filters and angled selfies.

What face shapes can it detect?

Seven: oval, round, square, heart, diamond, oblong and triangle. Most real faces sit close to one shape with traits of another, so read the measurements alongside the label.

How accurate is it?

With a proper front-facing photo, typically accurate enough for styling decisions like haircuts and glasses — but it is an estimate from photo proportions, not a professional measurement.

Can it work on someone else's photo?

Technically yes, but only use photos you have permission to analyse. For salon work, ask the client's permission before uploading their picture.

Does my face shape change over time?

Your bone structure stays largely stable as an adult, but weight changes and ageing can change how your shape appears. Re-check every year or two if your look has changed a lot.

Find Your Face Shape Today

Stop copying haircuts made for someone else's face. Take one clear, front-facing photo, run it through CodexFuse's free face shape detector, and walk into your next appointment with your actual measurements in hand. Then, if you run a salon or beauty business, move your website, booking and business email to CodexFuse — fully managed, on credits, no subscriptions — and let your site start answering clients' questions before they even call. Get started with CodexFuse today.