democast is an open-source CLI tool that converts slide decks (reveal.js or pptx) and optional scripted app demos into narrated MP4 videos. It streamlines the process for developers and presenters to create technical demo videos efficiently.
In the Developer Tools space, democast takes a focused approach. It focuses on automating the creation of narrated demo videos from slide decks and app scripts. democast is an open-source project aimed at developers and technical presenters. The project is open source (MIT). It runs on the command line.
Behind democast is xanhuang, and the product first shipped in 2026. Among its 5 catalogued features are slide deck to video, scripted demo integration, and narration support.
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