YouTube description generator
The first line has to work on its own
Only about the first 120 characters of a description show before "more", in search results and under the video, and for most viewers that line is the whole description. Each of the three options opens with a line written to stand alone under 120 characters, and the length of that line is shown beside it, flagged if it runs over.
The body, and what you add yourself
Under the first line each option has two or three short paragraphs about the video. It is told never to invent a link, a timestamp or a sponsor, so those are yours to add: paste your links and any sponsor disclosure after it, and make chapters from an outline with the chapter generator. The copy button takes the first line and the body together.
Start from what you already wrote
If the video already has a description, paste it into the box as the account of what the video is about and the three options are written from it. Inside Runsheet the video editor sends the title, the tags and the current description for you, so nothing is typed twice.
Related tools
This tool also runs over MCP, so Claude, Cursor or another MCP client can use it against your own channel. See the MCP page.
Questions about this tool
How long can a YouTube description be?
5000 characters, and the first 120 or so are what most people read, because that is all that shows before "more". Write the first line for the viewer deciding whether to watch, and use the rest for the detail, the links and the chapters.
Does it need an account?
Not for your first 3 runs a day: they are free with no sign-up. After that, a free account with no credit card: connect your channel and it includes 50 Cue credits a month, one balance for every drafting tool. The character counter, the line break tool and the bold text tool need no account at all, because they run entirely in your browser.
Will it make things up about my video?
It works only from what you type, and it is instructed to keep to your facts: any statistic, timestamp or sponsor in a draft comes from what you mentioned. The more specific you are, the better the draft.
Where do my channel's numbers come from?
From measurement. Runsheet uses a model to write copy, and every number it reports about your channel is measured, uses medians rather than means and carries its sample size.
Can I run YouTube description generator automatically?
Yes. Every tool here is also exposed as an MCP tool, so Claude, Cursor or anything else that speaks MCP can run it against your own channel. How to connect one is on the MCP page, https://runsheet.buildifyapp.in/mcp.
Do you keep what I type?
Runsheet sends the text you enter to Google's Gemini API to produce the answer, and records only that a generation happened and its cost in credits, so your balance can be kept.