Not just summaries — a tool for investigating videos.
Extract only what you need from a long video and jump to the exact scene in one tap.
One-click summaries
Open any YouTube video, click the extension, and a summary starts streaming in under 10 seconds — as long as captions exist.
Timestamped chapters
AI segments the video into logical chapters with titles, summaries, and start times. Click to jump to the exact moment.
Optimized for Japanese
A tuned prompt captures keigo, technical jargon, and industry nuance — the Japanese-quality moat SumTube is built on.
History and search
Every video you summarize is saved to your personal history. Search across them by keyword.