Long Hair Filter: Watch Your Own Hair Grow Out in a 10-Second AI Clip From One Photo

TikTok’s “long hair filter” commonly refers either to the 2023 viral format that combined a FaceApp-generated long-hair photo with a CapCut transition, or to the unrelated 2.25 Hair Length Filter, which measures facial proportions but does not visualize hairstyles. The guide explains how newer AI tools can produce both a long-hair preview from a single photo and a 10-second video in which hair appears to grow naturally from short to long, using an original image as the first frame and an AI-edited hairstyle image as the last frame. Effective prompts specify an exact length using body landmarks, preserve features such as hair color, clothing, lighting, and facial details, and instruct the video model to avoid cuts or hairstyle swaps during the transition. It also describes the original CapCut template’s role in the trend, notes that users can compare lengths such as a lob, shoulder-length hair, or mid-chest hair, and outlines options for men who want to add facial hair. Although the 2.25 rule may offer a rough suggestion about whether short or long hair suits facial proportions, the guide presents visual AI previews as more informative for assessing texture, parting, color, and overall appearance.

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