YouTube Description Generator

A YouTube description does three jobs. The first lines tell viewers and YouTube what the video is about. The chapters let viewers jump to the part they need. The links send viewers to your site, products or other videos. This generator builds all three from the details you enter, then checks the result against YouTube's rules while you edit, so you know before you publish whether your chapters will show and your text fits.

It is free and needs no account. Nothing is posted to your channel. You copy the result, or download it as a .txt file, and paste it into YouTube Studio yourself.

How to use the YouTube Description Generator

1. Enter the video title and the main keyword, the phrase a viewer would type to find this video, such as repot a monstera. You need at least one of the two.
2. Add three to six summary points, one per line. The tool uses up to 10 and strips bullets or numbers you paste in.
3. Add chapters as timestamp and title pairs from your edit. The first row starts at 0:00 Intro. Click + Add chapter for more rows.
4. Enter the video length (optional) so the tool can check that your last chapter is at least 10 seconds long.
5. Add links with a label, such as "Soil mix I use" and the URL. Links without https:// get it added.
6. Add hashtags, separated by commas. Spaces inside a tag are removed and duplicates are dropped.
7. Tick the extras you want: an affiliate disclosure and a subscribe line.
8. Press Generate description. Read the result in the text box, edit anything that does not sound like you, and watch the checks update.
9. Press Try another hook if you want a different opening. It cycles through several templates.
10. Copy it and, in YouTube Studio, open Content, click the video, paste into the Description field and save.

The opening hook is written by AI when our AI writer is available (a small number of free uses per day), and by built-in templates otherwise. Either way, read it through: a hook in your own voice beats a generic one.

How the description is structured

A worked example

Title: "How to Repot a Monstera Without Killing It". Keyword: repot a monstera. Four points: "Signs your monstera needs a bigger pot", "The soil mix I use and why", "Repotting step by step" and "Aftercare for the first two weeks". Chapters: 0:00 Intro, 0:42 Signs it needs repotting, 2:10 Soil mix, 4:05 Repotting, 9:30 Aftercare. Video length: 12:45. Two links, three hashtags, affiliate disclosure on.

The tool writes a hook such as "In this repot a monstera video, I walk you through signs your monstera needs a bigger pot and the soil mix I use and why." It adds "You will also see repotting step by step and aftercare for the first two weeks", then lists the four points, the five chapters, the two labeled links with the disclosure under them, and #monstera #houseplants #plantcare. The whole description stays well under 1,000 characters. The checks show the keyword in the first sentence, five valid chapters and three hashtags. You would then smooth the hook into "In this video I show you how to repot a monstera..." because a real sentence reads better than the raw keyword.

The checks, and the YouTube rules behind them

Length: 5,000 characters

YouTube descriptions can be up to 5,000 characters, counting spaces, line breaks, links and hashtags. The meter turns amber past 4,500 and red past 5,000. The tool also shows roughly how many characters appear before "more". Most videos need well under 1,500 characters.

No angle brackets

YouTube Studio rejects the characters < and > in descriptions, so the generator removes them and flags any you type by hand.

Keyword placement

The tool checks that your main keyword appears in the first sentence or at least the first two lines, and warns if it appears more than four times. YouTube's spam policies treat stuffing descriptions with keywords as a violation.

Chapter rules

Chapters only appear if your timestamps follow YouTube's chapter rules, and one broken rule hides all of them:

• The first timestamp must be 0:00.
• You need at least three timestamps, in ascending order.
• Each chapter must be at least 10 seconds long, including the last one before the video ends.
• Each timestamp starts its own line, followed by the title, as in 2:15 Mixing the dough. Use 1:02:30 style past an hour.

If you leave chapters out, YouTube may generate automatic chapters. Your own timestamps take priority.

Hashtag rules

From YouTube's hashtag policy: up to three hashtags from your description can appear above or next to the title, YouTube ignores all hashtags on a video with more than 60, and unrelated or misleading hashtags can get a video removed. The tool warns at 15 or more and fails at over 60.

Descriptions by type of creator

• Tutorial and how-to channels: chapters matter most. Viewers skip to the step they are stuck on, and detailed chapters can show as key moments in Google results.
• Product reviewers and affiliates: put the most important link in the first three lines, keep the disclosure on, and also tick the paid promotion box in Studio when a brand paid for the video.
• Shopify and e-commerce sellers: link straight to the product page, not the home page, and repeat the product name in the hook so shoppers searching for it find the video.
• Podcasters and long interviews: use chapters as a topic index and name the guests in the summary.
• Shorts creators: links in Shorts descriptions are not clickable, so keep Shorts descriptions to one line and a few hashtags, and use YouTube's related video link to point viewers to a long-form video.
• Teachers and students: list sources and further reading as links, which also answers the "where did this come from" comments.

Troubleshooting

• "Chapters will not show: the first timestamp must be 0:00." Start the first row at 0:00, not 0:05.
• "You need at least 3 timestamps." Add another chapter, or remove the chapter block entirely.
• "The chapter at 4:05 is only 6 seconds long." Merge it with the next chapter or move the next timestamp.
• "These timestamps are not valid." Use digits and colons only, such as 2:15 or 1:02:30. Minutes and seconds must be 59 or lower.
• My edits were not replaced when I changed a field. That is deliberate. Once you edit the text by hand, field changes are not applied. Press Generate or Try another hook to rebuild, which asks before replacing your edits.
• Chapters show in the tool but not on YouTube. Automatic chapters may be off, the video may be too short, or a later edit in Studio broke the order. Chapters can also take a little while to appear after saving.

Writing a better hook

• Use the keyword naturally in the first sentence. A list of keywords reads as spam to viewers and to YouTube.
• Promise the result. Say what the viewer will be able to do or know after watching.
• Do not repeat the title word for word. Add something the title did not say.
• Disclose paid links. If you use affiliate links or have a sponsor, say so clearly.

Privacy and limitations

The description is assembled in your browser. When you press Generate, only the title, keyword and summary points are sent to our server so the AI writer can draft the hook. Chapters, links and hashtags stay in your browser, and nothing is posted to YouTube. The tool does not check spelling in other languages, cannot see your video to verify chapter titles, and does not know your channel's links, so review every line before publishing.

Where this fits in your upload routine

Write the description after the title, because the hook should support it. Build the title with the YouTube title generator, write the description here, then add a short tag list from the YouTube tag generator, which keeps tags under YouTube's 500-character tag limit. To see how competing videos describe the same topic, check their tags with the YouTube tag extractor. If you publish often, YouTube Studio in AM Jarvis writes titles, descriptions and tag sets for each video in a topic cluster plan built from real YouTube search suggestions.