Get to the crux of any video.
Paste a YouTube URL. CRUX AI fetches the transcript, summarizes the key points with AI, and gives you something you can actually use — in seconds, not 40 minutes. Bring your own AI API key. Your data stays your data.
Create your accountTranscripts in seconds
Pulls captions for any YouTube video — including Shorts — with timestamps preserved.
Custom AI summaries
Bring your own AI API key. Use the default note-taking template, or write your own custom prompt for sales discovery, investment memos, course notes — whatever you need.
Export anywhere
Download as TXT, Markdown, Word, or SRT subtitles. Copy to clipboard. Drop into your notes.
Watching a video? One click to summarize.
Drag the CRUX AI button to your browser bookmarks bar. Click it from any YouTube page to summarize what you're watching — instantly.
Get the bookmarklet