Auto-Chapters: YouTube chapter timestamps from your transcript
AetherCut v1.7.1 shipped on with 5 updates to the private, browser-based video editor. Everything here is already included in the latest version. AetherCut edits on your own device, so your footage never has to be uploaded to a server.
What's new in v1.7.1
- New Pro tool: Auto-Chapters generates 4–12 YouTube-style chapter timestamps from your existing caption track using Claude Sonnet 4.5
- Copy YouTube format — pastes 00:00 Intro / 01:24 Topic Two / … straight into your video description (YouTube auto-renders chapters when 3+ timestamps are present)
- Add as text overlays — drop each chapter title onto the timeline as a 3-second top-of-frame card so the chapters show up on non-YouTube embeds too
- Validates against YouTube's actual chapter rules: first chapter forced to 0:00, minimum 10 seconds between chapters, max 12 entries
- Counted in the public tally: 38 total tools, 10 total AI features (was 37 / 9)
Related features
Try it
AetherCut is free to start and runs in Chrome, Edge, Safari and Firefox, with no install and no account needed to edit. Open the editor or see how it works.