Face Shape Detector is a free online AI face shape detection tool whose main appeal is "upload a photo to find out your face shape," with no registration required throughout.
[Main purpose] It helps users quickly confirm which of seven face shapes they have: oval, round, square, heart, diamond, oblong, or triangle. The identification result can be used to guide styling choices such as hairstyles, eyeglass frames, and makeup.
[How to use] Users can choose to upload an existing photo from their device (supports JPG, PNG, and WebP, up to 10MB), or directly use the device's front or rear camera to take a new photo. If they do not want to upload a photo, they can also use its calculator or quiz method. The official recommendation is to use a clear frontal photo with even lighting and hair not covering the face to obtain more accurate results.
[AI and privacy mechanism] The tool is powered by Google's MediaPipe, mapping 478 facial landmarks on the photo in real time, accurately measuring forehead width, cheekbone width, jawline width, and face length, and then calculating the proportional relationships that define face shape. The entire analysis runs locally in the browser, photos are not sent to any server, and no data is stored.
[Output results] Users can see their face shape, as well as a confidence breakdown for each face shape category. They can then view personalized suggestions for that face shape: hairstyles suitable for men and women, eyeglass frames that match facial proportions, makeup contouring techniques, and beard styling suggestions when applicable. The official description says detection is completed within seconds.
[Manual measurement method (alternative)] The official page also introduces the traditional measurement method: use a soft tape measure or string to measure four data points—forehead width (hairline to hairline, approximately midway between the hairline and the eyebrows), cheekbone width (the widest point across the top of the cheekbones between the outer eye corners), jawline width (from the tip of the chin to the jaw angle below the ear, then doubled to get total jaw width), and face length (the vertical distance from the center of the hairline to the tip of the chin at the lower lip). Interpretation rules: if face length is greater than width, it is oval or oblong; if length and width are roughly equal, it is round or square; if the cheekbones are the widest, it is oval or diamond; if the forehead is the widest, it is heart; if the jaw is the widest, it is triangle.
[Related tools and guides] The same site also provides a variety of beauty and styling tools, all stated to run in the browser and require no registration, including: AI hairstyle try-on, glasses try-on, eye shape detection, eyebrow shape detection, facial symmetry test, color analysis quiz, body shape calculator, lip shape analysis, nose shape detection (12 types), eye shape guide, AI age detection, skin tone analysis, AI skin analysis, attractiveness test, facial rating test, Kibbe body type guide, age estimation from photos, golden ratio face calculator, celebrity lookalike finder, canthal tilt calculator, and more. In addition, there are alsohairstyle and glasses style guides organized by face shape, such as whether a French crop suits your face shape, a half-up half-down hairstyle guide, a men's eyebrow grooming guide, and more.
[Limitations] The tool's related introduction does not provide commercial information such as fees or pricing, nor does it give specific accuracy figures. This information is not currently available.
