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YouTube Description Generator (FREE TOOL)

Say what your video covers. You get three descriptions ready to paste: the lines viewers see before "Show more", a summary, your own chapters and links, and three hashtags.

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A description the generator wrote for a video about fixing a sourdough starter, with the opening lines above the Show more fold

A description the generator wrote for a CapCut travel editing tutorial: the opening lines, the Show more fold, the chapters and links, three hashtags and the character count

A description the generator wrote for a budget gaming PC build video, with chapters and three hashtags

Video title

What the video covers

More details (optional)

Chapters

One timestamp per line, starting at 0:00. They go in as you typed them; the tool never makes one up.

Links

What viewers should do

Main keywords

Channel or brand

Anything else

What you type is sent to an AI model to write the descriptions. Nothing is published.

Built and checked by Marián Cabadaj. Last checked October 2026.

What the rules here come from

YouTube Help, Tips for video descriptions for the 5000 character limit, the two parts around "Show more", the first lines and the keyword advice.

YouTube Help, Video chapters for the chapter rules: 00:00 first, at least three in ascending order, 10 seconds minimum.

YouTube Help, Find playlists and videos using hashtags for up to three hashtags by the title and the 60 hashtag ceiling.

YouTube Help, Edit video settings for the 100 character title limit and the invalid characters rule.

YouTube Data API, the videos resource for which characters are invalid: the less-than and greater-than signs.

The examples on this page were made by the same code the tool runs.

The short answer

A YouTube description generator writes the text under a video from what the video covers. YouTube Help says to use the first few lines to describe your video, because they are what viewers see before "Show more".
A description holds 5,000 characters. This tool writes the opening lines, a summary and 3 hashtags, then adds your own chapters and links as you typed them.
Chapters need a first timestamp of 00:00, at least three in ascending order, and 10 seconds or more each. The tool tells you when yours break a rule.
The same tool works if you searched youtube video description generator or ai youtube description generator.

Our articles are still written by HUMANS! Get human written articles in your Google feed.

Add as preferred source

Descriptions for three different videos

Each was written by this tool from a title and a few sentences on the video. The tags for the same videos come from the YouTube tag generator.

What YouTube shows before Show more

YouTube Help splits a description into two parts: what viewers see before they click "Show more" on a computer or "more" on a phone, and what they see after. It suggests using the first few lines to describe the video, because that is what viewers read first, and keeping channel information for the second part.

That is why every draft here opens with one or two sentences on what this video gives the viewer, with the main keyword once, before anything else. The tool shows the fold in the result, so you can read the opening the way a viewer will.

How much of the text shows before the fold depends on the screen and the page, and YouTube does not publish a number. Keep the point of the video in the first sentence and it survives any cut.

The YouTube description rules this tool follows

What the generator writes to, read from YouTube Help and the YouTube Data API on 13 October 2026.

Rule	What YouTube says	Source
Length	5,000 characters	YouTube Help, Tips for video descriptions
First lines	What viewers see first, before "Show more"	YouTube Help, Tips for video descriptions
Chapters	First at 00:00, at least 3, ascending, each 10 seconds or longer	YouTube Help, Video chapters
Hashtags	Up to 3 show by the title; over 60 and YouTube ignores them all	YouTube Help, hashtags
Characters	No < or > signs	YouTube Data API, videos resource
Keywords	1 or 2 main words, a unique description per video	YouTube Help, Tips for video descriptions

Verified 2026-10-13.

How to use the YouTube description generator

Say what the video covers

The title, then a few sentences on the steps, tools, places and result. This box is the material for every line.
Add chapters and links

Optional. Paste your timestamps and links. They go in exactly as typed, and the tool checks the chapters.
Copy one and paste it

Three drafts come back, each built on a different part of the video. Copy the one you would publish.

Where the description goes in YouTube Studio

Open the video in YouTube Studio

Sign in to YouTube Studio, choose Content in the left menu, then click the video.
Paste into Description

Replace what is in the Description box with the copied text. Your timestamps become chapters there.
Save

Click Save. Manual chapters in the description replace the automatic ones YouTube would make.

YouTube channel description: what changes

A channel description is the text in your channel header, edited in YouTube Studio under Customization, then Profile. It describes every video, not one, so chapters and hashtags do not apply.

To draft one here, type the channel name as the title and what every video on the channel covers in the big box. Keep the opening lines and the summary, and delete the hashtags. The same first-lines rule holds: say what a viewer gets from the channel in the first sentence.

Why use a description generator

The fold decides if anyone reads on

Viewers see the first lines before "Show more". Three openings to choose from beat one you rewrote at midnight.

Chapters and links stay yours

The model never writes a timestamp or a URL. Yours are copied in word for word, so nothing points to the wrong place.

The chapter rules are checked for you

A first timestamp that is not 0:00 or a 5 second chapter means no chapters. The tool says so before you publish.

Three hashtags, not thirty

YouTube shows up to three by the title and ignores every hashtag past 60. The tool writes three.

How to get a description worth publishing

Type the real video into the box

Name the tool, the place, the numbers. A description built on "editing tips" reads like every other one.
Check the opening lines out loud

If the first sentence would fit any video, pick another draft. That sentence is the description for most viewers.
Keep each description unique

YouTube Help asks for a unique description per video. Run the tool again for the next video instead of reusing one.
Do not stack keywords

One or two main words, used naturally. YouTube does not allow repetitive sentences in the description, and a keyword list is one.
Start chapters at 0:00

And give each one at least 10 seconds. Otherwise YouTube shows the timestamps as text, not as chapters.

Who this description generator is for

1

Creators who publish every week

The description is the last box before publish. A draft built on the video beats a template you forgot to edit.

2

Tutorial and how-to channels

Chapters matter most on long how-to videos. The tool keeps your timestamps and checks them against YouTube's rules.

3

Brands posting product videos

Links and a clear ask belong in the description. The tool places yours and writes the opening around the product.

What every draft gives you

Four parts, in the order YouTube shows them, with the length counted for you.

The opening lines

One or two sentences under 150 characters that say what this video gives the viewer, with your main keyword once.

The summary

One paragraph on what the video shows, in order, ending on your ask if you typed one.

Your chapters and links

Copied in as typed, never invented. Lines without a timestamp are left out, and the tool says how many.

Three hashtags and a count

Specific to the video, with no spaces, plus the length against YouTube's 5,000 character limit.

YouTube description generator: FAQ

How long can a YouTube description be?

5,000 characters. YouTube Help says "The description allows a maximum of 5000 characters." The same limit applies whether you type it in YouTube Studio or paste it from here. Selling something in the video? Selzee makes ads for it from your store URL.

What should I put in a YouTube description?

Start with a few lines that describe the video, since viewers see them first. Then add chapters, links to related videos or playlists, and credits. YouTube Help suggests 1 or 2 main keywords and a unique description for every video. When the video promotes a product, Selzee can make the ads for it.

How do I add chapters to a YouTube video description?

Type one timestamp and title per line in the description. The first has to be 00:00, you need at least three in ascending order, and each chapter has to be at least 10 seconds long. Paste yours into the Chapters field and the tool checks them. For ads to go with the video, paste your store URL into Selzee.

How many hashtags should I put in a YouTube description?

Three is enough. YouTube shows up to three, the ones it considers most engaging, by the video title, and if a video has more than 60 hashtags it ignores every one. When your channel sells a product, start free with Selzee.

Does a YouTube description help with search?

Yes, it is one of the signals. YouTube Help says "Writing descriptions with keywords can help viewers find your videos more easily through search." Use the words viewers type, once or twice, in sentences. That covers search; for ads, Selzee makes them from ads already winning.

Can I write a YouTube channel description with this tool?

You can draft one. Type the channel name as the title and what all your videos cover in the big box, keep the opening and summary, and delete the hashtags. The channel description goes under Customization, then Profile, in YouTube Studio. If the channel belongs to a store, Selzee makes its ads.

Why did the tool not write my links or timestamps?

It never writes them, on purpose. A made-up link or timestamp sends viewers to the wrong place, so the tool only copies the ones you type into the Links and Chapters fields. When you want ads as well, start free with Selzee.

Is this YouTube description generator free?

Yes. No account, no email and no card. There is a small cap per page load, so the shared model stays available, and reloading gives you another batch. When you want ads too, start free with Selzee, no card needed.

Watch: setting up a YouTube description

Use This YouTube Video Description Template for More Views & Money (2026), a video by Think Media on YouTube.

How we checked

Last checked: 13 October 2026. The length, the first-lines advice and the keyword advice come from YouTube Help, Tips for video descriptions; the chapter rules from Video chapters; the hashtag display from the hashtags page, each read at the source.

The chapter check was worked by hand on seven cases, including a 5 second chapter, exactly 10 seconds and a timestamp past one hour, and the tool agrees with every one.
We recorded 10 live runs on one test video and checked each for the opening under 150 characters, the summary length, three hashtags, the chapters and links word for word, and no URL or timestamp from the model.
A different model from the one that writes the descriptions graded every run for specificity, the opening lines and invented facts.
Typical, boundary and hostile inputs ran through the real page: an empty form, broken chapters, a non-English video and an instruction typed into the covers box.
The three example descriptions above were generated by this tool on 13 October 2026.