Frequently Asked Questions

10 questions about YouTube chapters.

Q1. Chapters are in the description but not activating.

If any one of the 5 rules is violated, the entire list is ignored. Check the "Rule violations" section in this tool. The most common causes are: (1) first line is not 0:00, (2) gaps under 10 seconds, (3) bullet symbols used.

Q2. How do I format timestamps for videos over 1 hour?

Use the H:MM:SS format like 1:02:45. This tool automatically recognizes hour:minute:second format.

Q3. Do Shorts support chapters?

No. YouTube Shorts (60 seconds or less) do not support chapters. They only apply to regular videos (over 60 seconds).

Q4. Can I use emojis in chapter titles?

Yes, but the number and colon format must come first (e.g., "0:00 🎬 Intro" OK, "🎬 0:00 Intro" X).

Q5. Can I create up to 15 chapters?

YouTube officially stated there is no upper limit, but too many chapters may clip the player UI. We recommend keeping it under 20.

Q6. Will using chapters reduce ad revenue?

No. Chapters do not affect mid-roll ad placement and can actually increase watch time, which is positive for revenue.

Q7. Can I add chapters to an already uploaded video?

Yes. In YouTube Studio, go to the video details > Description, add the chapter list and save — changes are reflected immediately.

Q8. Can I use this for Kakao TV or Naver TV?

Those platforms do not officially support chapters. Use pinned comments with timestamps instead. You can copy the output from this tool directly.

Q9. Can I paste a video URL to automatically get chapter suggestions?

Not supported in the MVP. A serverless function is needed due to CORS restrictions and will be added in a future update.

Q10. The tool slows down when I paste many timestamps at once.

This tool uses client-side regex and can handle hundreds of lines instantly. If it's slow, a browser extension may be interfering.