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Clapmark

Chapters in 30 seconds,
not 30 minutes.

Clapmark reads your video's real transcript, segments it with TextTiling, and writes chapter timestamps directly to YouTube. No LLM. No upload. Pure algorithm.

How it works

  1. FetchRetrieves the real ASR transcript from YouTube — no upload required.
  2. SegmentTextTiling algorithm identifies topic boundaries in the token stream.
  3. NameTF-IDF scores each segment's vocabulary to produce a short, distinctive title.
  4. ApplyWrites chapter timestamps to your YouTube video description via OAuth.