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Free local tool

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Build YouTube chapter timestamps

Play the video, press M at each new topic, then copy the finished chapter list.

Load a video to markPress M while it plays. Your file stays local.

A manual marker that keeps you in the video

Pause or keep playing, then press M at every real topic change. Rename the markers in place and copy the finished block into the video description.

Turn this video into slides

What makes a valid YouTube chapter list?: Start at 00:00, include at least three chapters, keep timestamps ascending, and leave at least ten seconds between chapters.
Does this generate chapter titles with AI?: No. You mark the real topic changes and name them yourself while watching the video.