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YouTube Chapter Marker Generator

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Turn your raw timestamp list into a YouTube-compliant chapter description block — properly formatted and validated against YouTube's chapter rules.

Each line should start with a timestamp (mm:ss or h:mm:ss) followed by the chapter title. Separators "-", ":", "—" between time and title are accepted.

About YouTube Chapter Marker Generator

YouTube's automatic chapters feature looks simple but enforces a strict set of rules: the first chapter must start at 00:00; chapters must be at least 10 seconds long; you need at least three chapters; and timestamps must appear at the start of each line in the video description. The AT USE Chapter Marker Generator handles every one of those constraints automatically. Paste your timestamps and titles in any reasonable format and the tool validates them, fixes ordering, flags rules YouTube will reject, and outputs a clean description block ready to paste into YouTube Studio. Use it for tutorials, talks, podcasts, livestream replays, and product demos — anywhere you want viewers to jump to the section that matters to them.

Common use cases

  • Add chapters to a long-form tutorial so viewers can jump to lesson 3.
  • Mark talk sections in a recorded conference video.
  • Index a podcast episode by topic for quick navigation.
  • Add a "skip the intro" chapter to product demos.
  • Validate that an existing chapter list passes YouTube's rules before publishing.

How to use it

  1. Paste your raw timestamp list (one chapter per line).
  2. Click "Validate" — fixes are suggested for any rule violations.
  3. Copy the formatted chapter block.
  4. Paste it into the description field in YouTube Studio.

Frequently asked questions

Why does YouTube reject my chapters?

Common reasons: first timestamp not at 00:00, fewer than three chapters, a chapter shorter than 10 seconds, or out-of-order timestamps. The generator detects and fixes each of these.

Is this tool free?

Yes. Completely free, no login, no watermark, no signup required. Everything runs in your browser.

Will it work for livestream replays?

Yes. As long as you provide the timestamps measured from the start of the recording, the output works for VOD chapters.

Will it auto-suggest chapter titles?

No — chapter titles are yours to write. The tool focuses on validation and formatting so YouTube accepts the block on the first try.

Will it work for hours-long videos?

Yes. h:mm:ss format is fully supported.

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