Synthesia is a video creation platform that helps users turn written content, presentations, and recordings into editable videos. Its editor combines voiceover, structured scenes, and digital avatars, including professional stock avatars that can be prompted to take actions in different backgrounds and outfits. Users can upload PowerPoint files and convert slides into video projects, with speaker notes used as narration, or bring in external screen recordings to generate editable scripts and scenes.

The platform also supports voiceover regeneration and speed adjustments, helping creators refine how narration sounds. For visual content, users can generate custom images within the editor and experiment with generative AI models in the AI Playground. Synthesia also offers integrations with video-generation tools such as Sora 2 and Veo 3.1. To support learning and engagement, creators can add single- or multiple-choice quizzes, set passing thresholds, and display final scores. Together, these tools serve a range of communication needs, from sharing knowledge to promoting content and providing support.