YouTube Description Generator with Chapter Checker

How to use the YouTube description generator

1. Say what the viewer gets. Type a phrase such as "how to repot a snake plant" or a full sentence. The first sentence becomes your opening line; anything after it goes into the summary word for word.
2. Add 1 or 2 main keywords. The checks show whether each one is in your title and opening line, and warn if one repeats too often.
3. Add chapters. Type them row by row or paste a list like "00:00 Intro". Errors appear under the row that breaks a rule.
4. Add links and your footer. Links for this video go first; socials, gear and an about line are saved in this browser for your next upload.
5. Pick hashtags and copy. Press Shuffle wording to change the connecting sentences, then copy the full description into YouTube Studio.

What to put in a YouTube description, in order

Put what the video is about at the very top, because that is the part people see before they expand it. YouTube's tips for video descriptions recommend using the first few lines to describe the video, featuring 1 or 2 main keywords, and giving every video a unique description. The generator assembles the blocks in this order:

1. Opening lines: one or two sentences that say what the viewer gets. This is the part shown before "Show more".
2. Summary: the rest of your explanation, a keyword line if a main keyword is missing, a pointer to the chapters and an optional subscribe or comment line.
3. Chapters: timestamps with short titles, so viewers can jump to the part they need.
4. Corrections: only if you need to fix something after publishing.
5. Links: resources mentioned in the video, with an affiliate disclosure directly above them if any are affiliate links.
6. Channel footer: gear, socials and an about line you reuse on every upload.
7. Hashtags: a few relevant ones at the end.

YouTube Help pages cited on this page were last checked on September 26, 2026.

YouTube chapter rules the validator checks

Chapters only appear when the timestamp list follows YouTube's video chapters rules. If one rule is broken, the chapters may simply not appear, so the checker flags each problem on the row that causes it before you publish:

• The first timestamp is 00:00. A list that starts at 00:05 won't turn into chapters.
• At least 3 timestamps. Two chapters are not enough.
• Each chapter lasts at least 10 seconds. Add the video length and the last chapter is checked too.
• Ascending order. Every timestamp must come after the one before it.

YouTube can also add automatic chapters to eligible videos. You can switch them off for one video or in your upload defaults. Chapters of either kind are not available on channels with active strikes or on content that may be inappropriate for some viewers. Adding your own timestamps gives you control over the chapter titles.

Hashtags and keywords in the description

According to YouTube's hashtag policy, up to 3 hashtags from the description can appear by your video title, and YouTube chooses which. With more than 60, YouTube ignores every hashtag on the video. The tool stops you at 60, removes spaces (hashtags can't contain them) and counts any hashtags you typed into the summary as well.

Keywords work the same way: 1 or 2 main words in the title and description, used naturally. Hashtags are not tags, though. For the separate tags field, use the YouTube tag generator. For hashtag ideas, try the YouTube hashtag generator or our list of hashtags for YouTube Shorts.

Character limit, corrections and attribution

YouTube's video settings help gives descriptions a 5,000-character limit. The YouTube Data API, which upload and scheduling tools use, counts 5,000 bytes, so the tool shows both numbers.

To correct a mistake after publishing, add a line that says "Correction:" (or "Corrections:"), then each fix on its own line with a timestamp, after the chapters. The label must be in English even if the video isn't. To credit another creator's work, YouTube suggests the format [Channel Name] [Video Title] [Video ID].

Finish the upload

The description is one part of the upload. Draft title options with the YouTube title generator, then run your favourite through the YouTube title checker. Pick a slot with our guide to the best time to post on YouTube. If you need the next topic, browse these YouTube video ideas or turn a niche into a month of posts with the content idea generator.