HeyGen simplifies video creation, transforming text, images, or audio into dynamic videos with realistic AI avatars. Users access the web-based platform via any modern browser. The core process involves inputting a script, selecting an AI-generated voice, and pairing it with a realistic avatar. For text-to-video, users provide a script or describe their video, and HeyGen's AI produces high-quality 1080p or 4K cinematic videos with voiceovers and visuals. The photo-to-video feature enables uploading an image and adding a script to instantly generate a dynamic video, complete with realistic AI lip-sync, natural speech timing, and expressive voices. Videos can be enhanced with text overlays, background music, and smooth transitions. HeyGen's AI Studio offers a text-based editor, making video creation as simple as writing a document. Here, users direct, refine, and personalize AI videos, controlling tone, delivery, gestures, and emotion for a human-first storytelling experience. For product ads, users upload an image and script, and the Ad Generator places the product in an avatar's hand, allowing customization with music, captions, and voiceovers. Furthermore, HeyGen provides a robust API for seamless integration into existing workflows, enabling automated video generation, translation, speech creation, and template building. This allows for efficient creation of diverse video formats, including marketing content, social media posts, presentations, corporate training, and e-learning materials, all without traditional filming or complex editing software.