YouTube Chapter Formatter & Timestamp Validator

To make video chapters work in YouTube player and Google search snippets, YouTube enforces strict guidelines: 1) The first chapter timestamp must start at 00:00 (or 0:00). 2) Your video must have at least 3 chapters listed in ascending order. 3) Each chapter must be at least 10 seconds long. 4) Timestamps must be in chronological order without duplicates.

If you edited out a 15-second intro or added a 30-second sponsor shoutout after writing your timestamps, you do not need to manually recalculate every chapter! Use the "+/- Seconds Offset" input to automatically shift all timestamps forward or backward simultaneously.

Common reasons YouTube ignores chapters include: failing to start at 00:00, having fewer than 3 timestamps, having two chapters closer than 10 seconds apart, or having an active copyright strike on your channel.