Free tool
YouTube Description Generator
Fill in what your video covers and get a description with the parts in the right order — opening lines that earn the click, working chapters, links and hashtags.
What should a YouTube description include?
An opening line that earns the click, a short summary, chapters with timestamps, the links you mentioned, and a few hashtags. Only the first ~150 characters show before “…more”, and the field holds 5,000 in total — so the first two lines do most of the work, and everything else is there for the people who open it.
How to use the description generator
- Write the opening line first. It's the part that shows in search results and above the fold, so it should say what the viewer gets. Everything else can be tidied later.
- Add the parts you have. Context, key points, chapters, links, a request, a line about the channel. Anything you leave blank is left out rather than filled with a heading and nothing under it.
- Check the chapters. Paste your timestamps and the tool says whether YouTube will accept them as chapters — the rules are strict and quietly enforced.
- Copy it into Studio. One press, or download it as a text file to keep with the project.
Nothing is sent anywhere. The description is assembled in your browser as you type, so there's no waiting and no limit on how many you write.
The first 150 characters are the description
Two or three lines show under the video before “…more”, and roughly the same amount appears under the title in search results. On a phone it's less. That opening is doing the job the rest of the description cannot: convincing someone who hasn't pressed play.
Which is why the opening should not be spent on throat-clearing. “Welcome back to the channel” and “In this video, I'm going to show you…” are both the same sentence: nothing yet. Open with the thing itself — the problem, the result, the number, the disagreement. The tool shows exactly where the cut falls as you type, so you can see what survives.
| What gets seen | Why |
|---|---|
| “Hey everyone, welcome back! In today's video we're going to be taking a look at…” | Eighty characters spent before the subject arrives. The cut lands mid-sentence. |
| “A sourdough starter should be alive in seven days. Most stall on day three — here's what fixes it.” | The subject, the problem and the promise, all above the fold. |
There's no penalty for a plain opening line. There is a cost to a decorative one, and it's paid by every person who reads two lines and scrolls past.
Chapters have rules, and they're strict
Timestamps only become chapters when all of YouTube's conditions are met, and when one fails you get no warning: the timestamps simply stay as text.
| Rule | Why sets fail |
|---|---|
| The first chapter starts at 0:00 | Starting at 0:05 or 0:12 is the commonest reason nothing happens |
| At least three timestamps | Two chapters is not a chapter list |
| In ascending order | One line pasted out of sequence breaks the whole set |
| Each at least 10 seconds long | Rapid-fire chapters on a short video are refused |
The tool checks all four as you paste. If you'd rather link to a single moment than build a full set, the timestamp link generator makes a link that opens at an exact second.
Chapters are worth the trouble for a reason beyond tidiness: they segment the progress bar, so someone scrubbing sees named sections instead of a grey line. They also let Google surface individual moments of your video in search results, which is the one place a description reliably earns views on its own.
Where the chapters come from
Writing chapter titles from memory after editing is miserable, and it's the step most people skip. If the video is already uploaded, summarize it and you get a chapter map with timestamps taken from what was actually said — paste that straight into the box above and edit the wording.
The order the parts go in
There's no rule about order, but there is a sensible one, and it follows who is reading. The top is for someone deciding. The middle is for someone watching. The bottom is for someone who already likes you.
What belongs in the rest of it
- A short summary, in the words someone would search with. YouTube reads the description for context, even though it weighs the title more heavily.
- The links you mentioned out loud. "Link in the description" is a promise; an unlinked description breaks it.
- One request, not five. Subscribe, comment, join, follow, buy — a stack of asks reads as noise and gets none of them.
- Three hashtags at the end. The hashtag generator builds the set; the first three appear above your title.
- Affiliate or sponsorship disclosure, if either applies. That's a legal requirement in most places, not a stylistic choice, and it belongs near the top rather than buried.
What YouTube actually does with the description
Less than the SEO advice implies, and more than the sceptics say. YouTube reads it for context — what the video is about, what words people might use to find it — and Google indexes it for video results. Chapters feed key moments. None of that outranks the title, the thumbnail or how long people stay.
Two things it does not do. It does not reward keyword stuffing: a paragraph of repeated phrases at the bottom is visible to viewers, ignored by ranking, and covered by YouTube's spam and metadata policies. And links in descriptions carry no SEO weight for the site you're linking to — YouTube marks them so search engines don't pass credit. Link because you told someone you would, not because you're building backlinks.
Descriptions for Shorts
The field is the same, and almost nobody opens it. Chapters don't apply — Shorts don't have them — so what matters is the first line and the hashtags, which is roughly all that's visible. Write one sentence that would make sense read aloud, add two or three hashtags, and stop. A long description on a Short is work no one will see.
A description you can reuse
Everything after the chapters — the channel line, the links, the request — barely changes between videos. Write it once, keep it in a file, and the per-video work shrinks to the opening line and the chapters. That's the difference between descriptions that get written and descriptions that get left empty.
A block worth saving is short. Something like: one line on what the channel does and how often, the two or three links you mention in most videos, a single request, and your usual hashtags. Paste it into the fields above once, keep the result, and every future description starts four fields ahead.
The part that can't be templated is the chapters, and that's the part people skip. It's also the part with an obvious shortcut — see below.
Frequently asked questions
How long should a YouTube description be?
Long enough to cover the video, the chapters and the links — a few hundred words is normal. The limit is 5,000 characters, but only the first 150 or so show before “…more”, so length matters far less than what the opening says.
Why aren't my chapters showing?
Almost always the first timestamp isn't 0:00, there are fewer than three, or one chapter is under ten seconds. Paste them into the box above and it will tell you which rule is broken.
Do descriptions help a video rank?
They give YouTube context and they persuade people who are deciding whether to watch. The title and thumbnail matter more for the click, and watch time matters more than either afterwards.
Should I put keywords in the description?
Write the way people talk about the subject and the keywords arrive on their own. A block of repeated phrases at the bottom does nothing for search and makes the description worse for the people reading it.
Can I use the same description on every video?
The lower half, yes — the links, the ask, the channel line. The opening two lines should be specific to the video, because that's the part doing the persuading and the part YouTube reads for context. A channel where every video opens identically gives the algorithm nothing to tell them apart.
Do links in the description help my website's SEO?
No. YouTube marks outbound description links so search engines don't pass ranking credit through them. They're still worth adding — they send real people to real places — but they aren't backlinks in the SEO sense.
Where does an affiliate or sponsorship disclosure go?
Near the top, where it's visible without a tap, and in plain words. In most places it's a legal requirement rather than a courtesy, and burying it at the bottom of a 3,000-character description is the version regulators object to. You should also tick the paid-promotion box in Studio.
Is this description AI-generated?
No. It's assembled from what you type, in your browser, in the order YouTube expects. Your words stay yours, and nothing is sent to a server.
Need the chapters written for you?
Summarize the video and you get a chapter map with real timestamps to paste in.
Summarize a video — free