Timestamps that YouTube reads as chapters.

Put them in the video’s description, one chapter a line, each starting with its time: 0:00 Intro, then 1:05 Setup and so on. The first has to be 0:00, there have to be at least three, in order, and each chapter has to run at least 10 seconds.

Most often a rule is broken: no 0:00 first, fewer than three timestamps, times out of order, or a chapter under 10 seconds. The generator names which. If they all pass, YouTube’s help says chapters can also be off when the channel has an active strike, when the video may be inappropriate for some viewers, or when the channel doesn’t have access to the feature yet.

Minutes and seconds, 1:05, or hours, minutes and seconds, 1:02:03. The generator also reads (1:05), [1:05] and Title - 1:05, and copies every chapter as 0:00 Title, the way YouTube’s help shows them.

No. It is read in your browser. Nothing you type is sent anywhere or stored, and the page sets no cookies.