In simple English
This tool creates whiteboard and blackboard style explainer videos where a digital hand draws diagrams while a voice speaks. You describe what you want, an AI agent writes the scene script, and the software renders an MP4 video file. It runs locally on a Mac computer using built-in speech tools and open source software. It costs nothing to run and needs no external accounts or paid API keys. The final video syncs the spoken words with the drawing speed automatically.
What it is
A skill for the Claude Code command line assistant that generates whiteboard animation videos from text descriptions. It combines a JavaScript rendering script, Playwright (a tool for automating web browsers), and ffmpeg (a program for recording and converting video) to output ready-to-share MP4 files.
What it is good for
Solo builders who want to create product tutorials, educational explainers, or promotional videos without buying expensive video editing software or paying for cloud generation services.
- Generates videos for free using local computer tools and built-in speech voices.
- Automatically syncs the drawing speed to match the length of the spoken audio.
- Supports dark blackboard themes and light whiteboard themes with a single flag.
- Requires macOS to run the built-in speech synthesizer and video capture tools.
- Needs Node.js, npm, ffmpeg, and Playwright installed on your system beforehand.
- Relies on the Claude Code assistant workflow to write the underlying scene scripts.
Manual video editing software and paid cloud video generation tools
Claude Code
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git clone https://github.com/haiderfarooq3/khan-explainer ~/.claude/skills/khan-explainer cd ~/.claude/skills/khan-explainer/scripts && npm install && npx playwright install chromium