Summarize YouTube videos
into your AI knowledge base.
SubDownload turns any YouTube link into a clean transcript, an instant AI summary, and a searchable note in your personal Knowledge Base. Works with Claude, ChatGPT, and Cursor — even for videos without captions.
Three things SubDownload does for you.
Paste a link. Get a transcript, a summary, and a saved note your AI can reach. Three pillars, in the order they actually matter.
Works across your AI stack
Claude, ChatGPT, Cursor, and 40+ MCP-compatible agents. Transcripts and summaries are one tool call away — REST API, MCP server, or Agent Skills, your pick.
Your personal video library
Every video you process files into a Knowledge Base you own. Tag, favorite, and search across the full text of everything you've watched.
Summaries in seconds
Instant AI summary of any video. Transcript renders side-by-side with the player. Six export formats. Works even on videos without official captions.
Built for anyone who reads what they watch.
Researchers. Indie devs. PKM folks. Content creators. Anyone who thinks better in text than in playback.
For researchers
Skim hours of conference talks in minutes. Quote transcripts directly into your notes — verifiable, timestamped, traceable.
For indie devs & agent tinkerers
Plug an MCP server into Claude Desktop, Cursor, or Claude Code in a few minutes. Setup walkthrough ›
For PKM & knowledge builders
Build a searchable library that compounds with every video. How to build one ›
Paste a link.
Keep what's worth keeping.
No account needed for the basic tool.