Chapter and timecode editor

Validate chapter order, normalize timestamps and shift every chapter by an offset.

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Chapters: one timestamp and title per line

Shift every chapter, seconds Video duration, optional

Output

Generated text

Checks and notes

Your order is preserved: chapters are not sorted automatically. YouTube chapters need a first timestamp of 00:00, at least three chapters, and at least 10 seconds per chapter. Enter the video duration to check the final chapter.