[ The SNoutline ]
FORWARD OR RECESSED? IN ONE LINE.
Upload a side-profile photo, place one point on the bridge of the nose, and SNoutline lays a calibrated reference outline, so you can see your maxillary & jawline projection, against the reference for your age. Align it, refine it, keep your result.
[ What your subscription includes ]
01 · The instrument
THE SNOUTLINE APP, IN FULL.
All 18 age-calibrated reference profiles, one-point placement, fine-tune controls and unlimited PNG exports, on phone and desktop, running entirely in your browser.
02 · The assistant
YOUR FACIAL DEVELOPMENT QUESTIONS, ANSWERED 24/7.
Most AI answers about faces are the same ten mainstream articles reworded. This guide runs on a hand-curated library of facial-development and airway research, so its answers go deeper than the standard talking points. Orientation, not medical advice.
One subscription · both included · cancel anytime
[ How it works ]
THREE STEPS. TWO MINUTES.
PICK YOUR AGE GROUP.
Eighteen reference outlines, one per age from 1 to 18. Choose the closest — it calibrates the line you're about to place.
PLACE ONE POINT.
Upload a clear side-profile photo and click on the bridge of the nose – the soft-tissue nasion (n′). That single point anchors the entire outline.
ALIGN, REFINE, EXPORT.
Nudge scale and rotation until the line matches your proportions. Switch it to black or white for contrast, and export your result as a PNG.
WORKS ON Phone & desktop · pinch to resize · twist to rotate
[ The instrument ]
BUILT LIKE A MEASURING TOOL, NOT A FILTER.
The reference outline, anchored on n' (nasion point)
18 AGE-CALIBRATED REFERENCES
One reference outline for each age group, from 1 to 18+. You pick the closest – each outline is drawn from published growth data for that age.
ONE POINT, ONE CLICK
One click on the nasion point (n′) – the bridge of the nose – and the outline appears. No landmark marathon.
FINE-TUNING
Scale and rotate until the line meets the subnasion (sn') – the base of the nose. Flip, crop, black or white line for contrast.
KEEP THE RESULT WITH YOU
Download the overlay as a PNG: your photo, the reference line, exactly as you aligned it. Track your transformation over time or use as reference in professional treatment
[ Privacy ]
YOUR PHOTO NEVER LEAVES YOUR DEVICE.
Not as a promise, as architecture. The tool runs entirely in your browser. There is no upload step in the code.
Your photo
Your browser
Your export
PROCESSED WHERE IT WAS TAKEN
Computed in your browser, on your device. Never transmitted, never stored, never seen by us. There's nothing on our side to breach.
STRIPE IS THE WHOLE ACCOUNT
No account, no password. A one-time link arrives by email, valid for 15 minutes. Cancel in Stripe and access ends with it.
Results belong to you
Exports save straight to your device. No gallery, no history, no copies. The only record is your downloads folder.
Payments & identity run on Stripe – we never see your card details
[ Access ]
ONE SUBSCRIPTION. EVERYTHING ABOVE.
€4.20
per monthLaunch price
Ready in under a minute · cancel anytime
Secure payment by Stripe
[ Honest positioning ]
WHAT IT IS. WHAT IT ISN'T.
It is
It is not
If something you see concerns you, take it to a professional: an orthodontist, an ENT, or a myofunctional therapist. An off-line profile that breathes, chews, sleeps and feels perfectly healthy rarely requires intervention.
STILL DECIDING? START HERE.
What SNoutline is
What is SNoutline?
SNoutline is a browser-based tool that overlays a calibrated reference line on a side-profile photo, letting you see how your midface and jaw projection compare to age-matched growth data – the same category of reference orthodontists use, adapted from a clinical X-ray process to a photo you take yourself. It runs entirely on your device; no photo is ever uploaded.
What is the SNoutline actually based on?
A cephalometric reference line clinicians have used for decades to assess midface and jaw projection from a side profile – the same category of tool used in orthodontic practice, just built for a phone camera instead of an X-ray.
Why hasn't something like this existed for regular people before?
Because the reference lived in clinical practice, not consumer tools. Most people size up their face from the front – mirrors, selfies – even though maxilla, midface and jawline concerns are fundamentally profile questions. There's never been a way to see your own facial growth pattern, let alone track it, without booking an appointment. SNoutline is that reference, run from a photo you take yourself.
Why is it called SNoutline?
Two reasons, both intentional. It's a literal contraction of the two landmark points the line anchors to: the nasion (n′) and the subnasion (sn′) - SN, outlined.
Is SNoutline the same as a "jawline test" or filter app?
No. Filters and gamified "jawline score" tools are cosmetic and made up on the spot. SNoutline anchors to real growth-study reference data and shows you a measurement, not a score – it's closer to a self-administered version of a clinical tool than to a beauty filter.
What's the difference between this and an actual cephalometric X-ray?
An X-ray captures skeletal landmarks directly; SNoutline estimates the same reference points from a photo. That makes it faster and accessible, but less precise – good for tracking your own change over time, not for clinical decisions.
Using it
What do I need to use it?
A clear side-profile photo - head level, hair off your forehead - and about two minutes. Works on phone and desktop, directly in the browser; nothing to install.
How accurate is the result?
As accurate as a photo-based tool can be - not as accurate as a clinical cephalometric X-ray. It's built on the same category of reference line used in that clinical process, just estimated from a photo instead of a radiograph. Good for tracking your own change over time; not a substitute for a professional reading.
Which age profile should I pick?
The one closest to the age of the person in the photo - one outline per age from 1 to 18+. For adults, use 18+. The first step of the tool walks you through this.
What is n′ and where do I click?
n′ (the soft-tissue nasion) is the small dip at the bridge of the nose, between the eyes. You click it once and the whole reference outline anchors itself to that point. You can drag to fine-tune anytime.
Can I compare two photos over time to see change?
Yes, manually – export and date your own overlays as you go, then compare them side by side. There is a timeline provided. Nothing is stored on our end (see 'Is my photo uploaded anywhere?' above), so the history is whatever you keep on your own device.
Can I use this on someone else's photo – my child, a partner, a client?
Yes – the SNoutline works from any clear side-profile photo, run entirely on the device you're using. If it's someone else's photo, get their consent (or a parent/guardian's, for a minor) before taking it.
Is it appropriate to use this on a young child's photo?
The reference outlines cover ages 1–18 because facial growth is commonly tracked across that whole range in orthodontic practice. That said, SNoutline is a visual reference, not a screening tool. If you have any concern about a child's development, a pediatric dentist or orthodontist is the right first step, not a photo overlay.
Privacy
Is my photo uploaded anywhere?
No. The tool runs entirely in your browser: the photo is opened on your device, the outline is drawn on your device, and the export is saved to your device. There is no upload step in the code.
Is my conversation with the Assistant private too, or just my photo?
Your photo never leaves your device. Conversations with the Assistant are different: they run through the chat service, and they are logged and may be used to improve the Assistant. Do not share anything in the chat you would not want retained. Photos are never part of that log, because they never reach us in the first place.
Reading the result
Does the overlay tell me if something is wrong?
No – and it is not meant to. The outline is a visual reference, not a diagnosis. If what you see concerns you, the included assistant can help you understand what you are looking at and which kind of professional to talk to. For any medical question, see a professional.
What if my profile isn't close to the reference line?
Extremely common - most people today fall outside the reference range, and that's normal, not a red flag. It reflects one studied population's data, and real faces vary for all kinds of reasons - genetics, family, ancestry among them. Being off it says nothing on its own about your health.
Why does almost nobody match this reference today – was it ever realistic?
The reference line comes from a large, real growth study - thousands of children tracked with repeated measurements across childhood, done decades ago, before a lot of today's soft-diet and screen-driven habits took hold. It's not a theoretical ideal invented in a lab; it's what real facial development looked like in a population studied before the shifts that now make it common to fall outside that range. That's exactly why the gap is worth noticing, even if it isn't cause for alarm.
What am I actually supposed to do with the result?
It's a reference point, not a verdict. A gap between your profile and the reference is sometimes just how you're built. Other times, it's a reason to notice things you'd otherwise never think to check - your breathing pattern, your sleep quality, habits that quietly shape how your face and airway work. SNoutline doesn't tell you what's wrong; it gives you a reason to pay attention.
Should I do anything if my result doesn't match the reference?
Only if something else is already telling you to. If you breathe well, sleep well, and feel healthy, an off-reference profile by itself isn't a reason to act. If you already snore, mouth-breathe, or deal with daytime fatigue, this might be the nudge to look into why – not because the line said so, but because those are worth checking regardless of what your profile looks like.
Jaw, midface & maxilla
How can I tell if my jaw or midface is recessed?
The clearest way is a side-profile comparison against a growth reference – which is what SNoutline does. Frontal photos and mirrors don't show projection at all; recession is a side profile question, not a frontal one.
Can I tell if my maxilla is underdeveloped from a photo?
You can see projection – whether your midface sits forward or back relative to age-matched growth data – which is the visible profile signature of maxillary development. That's what SNoutline shows. It can't measure palate width, arch form, or bone density from a photo; those need an in-person exam.
What does maxillary retrusion actually look like?
A flatter, more set-back midface profile than the growth reference for your age, often paired with a flatter cheek area and less nasal base projection, since the maxilla supports both. SNoutline's overlay is built to show you exactly this – where your profile sits against that reference.
Does SNoutline show if I need palate expansion?
Not directly. SNoutline shows maxillary (palate) projection – how far forward or back your midface sits – not palate width. The two are often part of the same conversation in treatment, but width is a separate measurement, usually checked intraorally by an orthodontist. If your profile shows recession, that's worth raising with a professional, who can assess width too.
Is mewing supposed to change my maxilla position?
That's the theory behind correct tongue posture in the orthotropic approach: sustained tongue-to-palate pressure is thought to support forward maxillary growth, particularly during growth years. SNoutline doesn't measure whether mewing is working – it gives you a consistent way to check your own profile over time, which is what an honest before/after actually requires.
Does palatal expansion (like MARPE) move my maxilla forward?
Mainly, no - MARPE's primary effect is transverse, widening the palate side to side. Studies do show a small secondary forward shift from MARPE alone (roughly a millimeter), but it's modest. Meaningful forward advancement of the maxilla typically comes from facemask protraction (in growing patients) or surgery (in adults) – expansion and advancement are related but distinct treatment goals.
Is there a free way to check my facial profile?
The traditional route – a cephalometric X-ray and a professional reading – usually means an orthodontic consultation. SNoutline brings the same category of reference to a photo, at a fraction of the cost and without an appointment, though it's an estimate, not a clinical-grade reading.
Subscription & account
Is SNoutline free, or is there a cost?
It's a subscription – currently €4.20/month at launch pricing – covering both the SNoutline app and the Assistant. Cancel anytime through Stripe.
Why is this a subscription instead of a one-time purchase?
Because both the app and the Assistant keep getting maintained - new reference data, fixes, expanding Assistant content. €4.20/month is the current launch price; cancel anytime and access ends immediately, no lock-in.
How do I sign in on another device?
Enter the email you subscribed with, and a one-time sign-in link arrives, valid for 15 minutes. No password to create or remember; your subscription is the account.
How do I cancel?
Cancel through Stripe anytime – the link is in your subscription emails. Access ends with the subscription; nothing else to close.
More questions · contact@onejaw.com

