Build a validated, YouTube-ready chapter list from labels and times.
YouTube needs at least 3 chapters to turn this into a chapter bar — you have 1.
0:00 Intro
YouTube has three specific, easy-to-miss requirements before a pasted timestamp list turns into a real chapter bar: the first chapter must be 0:00, there must be at least 3 chapters, and each one needs at least 10 seconds of breathing room from the last. This tool checks all three live as you build the list, so nothing gets pasted in only to silently not work.
The three most common reasons: the first timestamp isn't 0:00, there are fewer than 3 chapters, or two chapters are less than 10 seconds apart — this tool checks for exactly these three issues before you paste anything.
Chapters are always displayed sorted by time automatically, so there's no manual reordering needed — just fix the time if a chapter is in the wrong place.
No — you'll still need to scrub through your own video to note where each chapter should start; this tool only handles the formatting and validation.
No limit from this tool — YouTube itself doesn't publish a hard cap either, though very long chapter lists become less useful for viewers.
