Free tool · runs in your browser
Jawline Test
Is your jaw actually weak, or is it puffiness? Symmi measures the angle, the width and the chin from a straight-on photo, then tells you which readings are bone and which ones a routine can move.
Drop a photo, paste one, or choose a file
Straight-on, whole face visible, even light. JPG, PNG or WebP.
Runs in your browser. Your photo never leaves your device.
How it is measured
Angle, width, chin. Three things a jawline is.
From a front view the tool measures the jaw angle at the gonion (where the jaw turns toward the chin), the width across the jaw as a fraction of the widest part of the face, the width across the lower jaw near the chin, and where the chin point sits relative to the midline. Each is compared with the band that reads as defined on most faces.
- Jaw angle
- Angle at the chin between the two jaw corners. 108° to 122° reads as defined; 122° to 128° reads broad; over 128° the jaw slopes into the neck; under 108° the jaw reads sharp and narrow.
- Jaw : face width
- Jaw width over face width. 0.72 to 0.84 is the typical range on a front view; over 0.84 reads square.
- Lower jaw : face
- Width near the chin over face width. Shows taper: too low reads pointed, too high reads boxy.
- Chin offset
- Left or right of the brow midline, as a percent of face width. Over 1.5 percent is usually noticed.
- Chin height
- Lower lip to chin point as a share of the lower third (nose base to chin). 60 to 72 percent is typical; short chins read as recessed on a front view.
Related tools
FAQ
Can a jawline be trained?+
The bone cannot. What sits on it can: submental fat, fluid, and the platysma and masseter tone that define the edge. A puffy lower face can move the jaw angle reading by several degrees. The Symmi app scans, then routes gua sha, ice and chin work into a daily three-move routine and rescans to show the difference.
Does chewing gum help?+
Masseter growth widens the jaw angle area slightly over months; it does not sharpen the line under the chin. See the article below for the six-month numbers.
Why does my jaw look wider in selfies?+
Phone lenses at arm's length distort the lower face. Measure from a photo taken at arm's length or further, straight on, and compare like with like.
Is my photo uploaded?+
No. The measurement runs in your browser and your photo stays on 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.