Free · no signup · runs in your browser
YouTube description generator
Build a video or channel description from your own words, with chapters, hashtags and length checked against YouTube's rules. No AI model, no signup: everything runs in your browser.
Your description
- 0/5,000 characters
How the description generator works
You write the parts only you know: the opening line, a short summary, your chapters, links and hashtags. The tool puts them in a standard order and checks them against YouTube's own rules. Nothing is sent to an AI model or a server. A channel description mode builds the About text for the channel page from what the channel makes and who it is for.
The rules it checks
5,000 characters
YouTube's edit video settings help page says descriptions have a 5,000-character limit.
Chapters
YouTube's chapters help page says the first timestamp must be 00:00, you need at least three in ascending order, and each chapter must be at least 10 seconds. The tool flags each break of those rules.
Hashtags
YouTube shows up to three hashtags by the title. Its hashtag policy says that with more than 60 hashtags, all of them are ignored, and that over-tagging can get a video removed from search.
The first lines
Only the start of the description shows before “more”. The tool shows the first ~150 characters as a rule of thumb (YouTube does not publish the cutoff) and checks your keyword is in them.
Write it for viewers, not for search
YouTube's hashtag policy says adding ordinary descriptive tags or repetitive sentences to the description is prohibited, so do not paste a keyword list. Write what the video covers in plain sentences. If you use AI for any part of the video, the YouTube AI content policy page covers what needs a disclosure and what does not. Pair the description with a thumbnail checked in the thumbnail size checker.
Frequently asked questions
How long can a YouTube description be?
5,000 characters, according to YouTube's edit video settings help page. Only the first lines show before viewers tap more, so put what the video is about at the start.
How do I add chapters to a YouTube description?
List timestamps and titles in the description. YouTube's chapters help page says the first timestamp must be 00:00, there must be at least three timestamps in ascending order, and each chapter must be at least 10 seconds long. The tool checks those rules.
How many hashtags should I use on YouTube?
YouTube shows up to three hashtags by the video title. Its hashtag policy says that if a video has more than 60 hashtags, all of them are ignored, and that over-tagging can lead to removal from search. A few relevant hashtags are enough.
Is this an AI YouTube description generator?
No. It assembles your own text into a standard structure and checks it against YouTube's rules, entirely in your browser. No AI model is called and nothing is stored.
What should a YouTube channel description say?
What the channel makes, who it is for, and how often you upload, in the first lines. Switch the tool to channel description mode to build one. YouTube's help page for the channel profile does not state a character limit, so keep it short and specific.
Should I put keywords in the description?
Write the main topic naturally in the first lines. YouTube's hashtag policy says ordinary descriptive tags or repetitive sentences in the description are prohibited, so do not paste a keyword list.
More free tools
YouTube thumbnail size checker — 1280×720, 16:9 and file-size checks, plus the safe-zone overlay.
YouTube thumbnail tester — see the thumbnail next to this title in the feed and in search.
YouTube title generator — title drafts from formulas, with length and keyword checks.
Built by Elevate — a faceless YouTube mentorship with AI tools for people starting a channel.