PSL Scale AI is a web-based facial analysis tool that provides a PSL Scale score and AI face rating from a single front-facing photograph. The service allows users to upload one clear image and receive an overall PSL score, tier, confidence level, and facial rating without requiring registration or payment. The tool operates through a three-step process: users first upload a clear, front-facing photo with full facial visibility and even lighting, then the system processes the image through a single API request that evaluates six facial components including harmony, symmetry, eye area, midface structure, jaw and chin, and facial contour, and finally displays the complete report with the overall score and its breakdown. The six-part facial analysis report provides a detailed breakdown of visible facial structure, examining how the eyes, nose, lips, cheekbones, jaw, and chin interact within the facial harmony assessment. The report includes evidence, identified strengths, focus areas, and practical suggestions for users who want more than the headline score. The tool also checks photo quality factors such as angle, lighting, visibility, and image clarity, allowing users to understand when the photo itself influences the result. The full report is available at no cost, though users must opt in to receive the detailed six-part analysis, while the basic score is provided immediately upon upload. The service accepts JPG, PNG, or WebP images up to 10 MB in size. Uploaded photos are re-encoded and used temporarily for a single assessment, then deleted after processing, making the analysis flow private and self-contained. The tool is presented as a photo-based reading rather than medical advice or a diagnostic instrument. The website also references a 2024 study indicating that short selfie distances can alter visible midface proportions, and recommends keeping the camera slightly farther away to make repeat results more comparable across sessions.