YouTube Chapter Timestamp Generator & Validator
Check YouTube chapter requirements, shift every timestamp at once, and copy a clean description-ready list.
Chapter list
Validate formatting before you publish.
Ready to paste
4 chapters detected
0:00 Intro 0:18 What you need 1:42 Step-by-step guide 4:10 Final tipsIf copying is blocked, select the formatted text above and copy it manually.Your chapter text is processed locally and is never sent to analytics.
How the calculator works
Paste timestamps followed by chapter titles. The validator checks that the list begins at 0:00, contains at least three valid chapters, stays in chronological order, and leaves at least 10 seconds between chapters.
An optional offset shifts all valid timestamps together. Your titles and pasted text remain local to your browser.
0:00 Title- At least three chapters
- First chapter starts at 0:00
- At least 10 seconds between chapters
- Strictly increasing timestamps
Frequently asked questions
What format do YouTube chapters use?+
Put one timestamp and title on each line, such as 0:00 Intro. The first timestamp must begin at 0:00.
Why are my YouTube chapters not working?+
A common cause is fewer than three timestamps, a first chapter that does not start at 0:00, or chapters spaced less than 10 seconds apart.
Can I shift every chapter timestamp?+
Yes. Enter a positive or negative offset in seconds to update every valid timestamp while keeping results at or above 0:00.