SEO Check Tools

YouTube Chapter & Timestamp Generator

Format chapters and timestamps for YouTube descriptions. Validates ordering and the required 0:00 start.

How to use this tool

  1. 1

    Paste your timestamped lines

    One chapter per line, format '0:00 Title' or '0:00 - Title'. Hours work too: '1:23:45 Title'. Use the 'Try a sample' button for a working example.

  2. 2

    Read the validation banner

    Green = YouTube will display your chapters. Red = something violates the rules and YouTube will silently skip rendering chapters until you fix it.

  3. 3

    Fix any errors

    Common issues: first timestamp isn't 0:00, fewer than 3 chapters, a chapter shorter than 10 seconds, timestamps not strictly ascending.

  4. 4

    Choose your output format

    Plain '0:00 Title' or dash-separated '0:00 - Title' — match what the rest of your description uses.

  5. 5

    Copy the formatted block

    Paste it into your video description in YouTube Studio. The chapters appear on the progress bar within a few minutes.

YouTube SEO tips

Field-tested principles for getting more out of this part of the workflow.

  • Chapters significantly boost average view duration on long-form videos by letting viewers skip to what they want.
  • First timestamp must be 0:00, you need at least 3 chapters, each chapter must be at least 10 seconds long, and timestamps must strictly ascend. YouTube silently ignores chapters that violate any of these rules.
  • Use chapters for videos longer than ~3 minutes. Shorter videos don't benefit and may look over-engineered.
  • Don't sandbag the intro at 0:00. Use it as the actual chapter title (e.g. '0:00 What we're building'), not a filler word.
  • Chapter titles get truncated visually around 40-50 characters on mobile. Keep them concise.
  • Use chapters as a content-planning tool: write them before filming to enforce structure.
  • Emojis render fine in chapter titles but don't help with SEO. Use them for visual hierarchy on long videos, not engagement bait.
  • YouTube Shorts don't support chapters at all.

Read the related guide

YouTube SEO in 2026: The Complete Guide

Why chapter structure matters for retention curves and how YouTube's algorithm reads them.

12 min read

About the Chapter Generator

YouTube chapters break a long video into navigable segments that show up as clickable markers on the progress bar. They're a free engagement boost — viewers skip to what they want and stay longer overall — and they help YouTube's algorithm understand the structure of your content.

The catch is that YouTube's rules for chapters to activate are strict and silent. If anything is off, chapters just don't show. This tool parses your timestamped lines, validates them against those rules, and tells you exactly what's wrong if anything is.

YouTube's chapter rules

  • 1. The first chapter must start at 0:00
  • 2. There must be at least 3 chapters total
  • 3. Each chapter must be at least 10 seconds long
  • 4. Timestamps must be in strict ascending order

Supported input formats

  • 0:00 Intro — standard format
  • 0:00 - Intro — with dash separator
  • 0:00 — Intro — with em-dash separator
  • 00:00:00 Intro — with hours

Frequently asked questions

What are YouTube's exact requirements for chapters to work?+

Four rules, all required. First timestamp must be 0:00. At least three chapters total. Each chapter must be at least 10 seconds long. Timestamps must be in strict ascending order. Miss any one and YouTube quietly skips rendering chapters on your video — no error, just nothing happens.

Why does my video show chapters anyway when I miss a rule?+

It probably doesn't — you're likely looking at automatic chapters generated by YouTube's AI. Those use the same UI but are inferred from the video, not from your description. You can disable AI chapters in YouTube Studio if they're showing instead of your manual ones.

Does the title length affect anything?+

No hard limit, but chapter titles get truncated visually in the chapter list around 40-50 characters depending on viewport. Keep them concise — they're navigation labels, not titles.

Can I use emojis in chapter titles?+

Yes. Emojis render fine in the YouTube chapter UI. Some creators use them as visual category markers (🎵 for music sections, 💡 for tips, etc.) — fine for engagement but not a ranking factor.

What about chapter thumbnails?+

YouTube auto-generates a thumbnail for each chapter from the frame at the chapter start time. You can't override this from the description — only from YouTube Studio's chapter editor.

Will this work for Shorts?+

No. YouTube Shorts don't support chapters at all. Chapters only work for long-form videos (typically 1+ minute, though there's no official minimum).

Do you save what I paste here?+

No. Everything is parsed in your browser. The input never leaves your device.

Related tools

Pair this with other tools for a complete video description.