YouTube Alchemy

Userscript and extension adding 200+ layout tweaks and features to YouTube, fully client-side.

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YouTube Alchemy is a free, open-source userscript and browser extension that adds over 200 layout tweaks and features to YouTube, including a transcript exporter that sends a video's transcript straight to NotebookLM or ChatGPT for summarizing, tab view, granular playback speed control, and auto-theater mode. It runs entirely client-side with no external servers or data collection. It's built for YouTube power users who want deep layout and workflow customization beyond YouTube's default settings.

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