YouTube Description
Generator Fold Preview Live
The only description generator with a live watch-page fold preview: as you edit, you see exactly what survives above "...more" — keyword highlighted, position measured — plus a scored SEO checklist that updates on every keystroke. Write once, know it works before you publish.
- ● Fold preview: the first 150 chars, rendered
- ● Scored SEO checklist, live
- ● Chapters & links scaffold
- ● Links block saved locally
Hook, expansion, chapters scaffold, links block, CTA and hashtags — then edit it live against the watch-page fold preview and the scored checklist.
The first 150 characters rendered as the watch page shows them — keyword highlighted, "...more" where YouTube puts it, updated on every keystroke.
Five deterministic checks worth 100 points: keyword in the fold, valid chapters, 3–15 hashtags, a CTA and at least one link — each with a fix-it hint.
Chapters block, links block, CTA and hashtag line included — you edit timestamps, not structure. Links are remembered in your browser.
No signup, no watermark, no daily cap. The audit mode works entirely in your browser.
Reference
Where your description actually shows
A YouTube description isn't one surface — it's five, each with its own rules. The checklist scores exactly these, which is why every point on this page maps to a row below.
| Surface | What it shows | Rule that matters |
|---|---|---|
| Search snippet | ≈ the first 150 characters | Your main keyword must live here |
| Watch page fold | The same slice, then "...more" | Most viewers never expand it |
| Above the title | Your first 3 hashtags | Over 15 hashtags → ALL are ignored |
| Player chapters | The 00:00 timestamp list | 00:00 start, 3+ entries, ascending |
| Full description | Everything, when expanded | Hard limit: 5,000 characters |
How to
Write a description that survives the fold
Topic, optional target keywords, and your links block — saved in your browser so video #2 takes ten seconds. The fold preview reacts while you type.
Keyword-rich hook, expansion paragraph, chapters starting at 00:00, your links, a CTA and three hashtags — the structure top channels use.
Rewrite freely in the editor. The fold preview and the 100-point checklist update on every keystroke — you see each fix land in real time.
Swap the placeholder timestamps for your real ones (or generate them from a transcript with our Chapters Generator), copy, publish.
Who it's for
Built for publish-day speed and SEO discipline
Solo creators stop writing descriptions in Studio's tiny box with no feedback. Here the fold preview shows the slice that actually matters while the checklist keeps the SEO honest.
Consistent uploaders feel the links memory by video #2: socials, gear list and affiliate links injected automatically, identical every time — the way sponsors and viewers expect.
Channel managers & agencies standardise quality across clients: every description leaves with the same 100-point bar cleared, and the audit mode grades the backlog they inherited.
Educators & long-form channels live off chapters: the scaffold starts at 00:00 with a valid structure, and the checklist flags it the moment an edit breaks the ascending order.
Two modes
Generate a new description vs audit the one you have
Same fold preview, same 100-point checklist — two starting points. One builds the description for you; the other grades the one you (or the channel you just took over) already published.
From a topic
Topic in, complete scaffold out — then you edit against the live preview. What the scaffold always includes:
- Hook
keyword-rich, inside the first 150 chars - Chapters
00:00 start, 5 editable entries - Links
your saved block, injected automatically - CTA
one honest ask — like, subscribe, comment - Hashtags
3, topic-derived — the ones shown above the title
Your existing description
Paste what's already on the video, set the keyword, read the verdict. Typical findings on inherited channels:
−30keyword first appears in paragraph three — invisible to search−25chapters start at 00:12, so the player shows none of them−2023 hashtags — over 15, YouTube ignores every single one−15no ask at all — engagement left on the table
Nothing is sent anywhere — the audit runs entirely in your browser.
Which should I use?
New video — Generate, then spend your editing time on the fold sentence, because it's the only part most viewers ever see. Existing catalogue — Audit your top 10 videos first: fixing a broken chapter list or a buried keyword on an old video is the cheapest SEO win on YouTube.
One tool, every intent
However you searched for it, this is the page
People land here hunting an AI description generator, a description template, a description checker or just a faster publish day. One workflow: generate, edit against the fold, clear the checklist, paste.
A template that isn't a template
Static description templates die the moment you paste them — wrong keyword, wrong links, stale hashtags. The scaffold here is built from your topic and your saved links, then graded live as you make it yours.
The first 150 characters are the whole game
Search snippets and the watch-page fold quote the same opening slice. That's why the keyword check is worth 30 points — the biggest single item on the checklist — and why the preview renders that slice and nothing else.
Chapters the player actually honours
YouTube silently drops chapter lists that don't start at 00:00, have fewer than 3 entries or jump backwards. The checklist validates all three rules on every edit — and our Chapters Generator fills the real timestamps from a transcript.
A description checker for old videos
Audit mode grades any existing description against the same 100 points. Run your top performers through it — a buried keyword or an ignored hashtag block on a video that already ranks is free traffic waiting.
Also known as
- youtube description generator
- ai youtube description generator
- youtube description generator free
- youtube description generator ai
- youtube video description generator
- youtube description template
- youtube description writer
- youtube description maker
- youtube description example
- youtube seo description generator
- youtube description checker
- youtube description optimizer
Related YouTube tools
Keep the workflow going
Fill the chapters scaffold with real timestamps from the Chapters Generator, and study how top videos structure theirs with the extractor.
FAQ
Frequently asked questions
How does this YouTube description generator work?+
Give it your topic (plus optional target keywords and your links block) and the engine drafts a complete description: keyword-rich hook in the first 150 characters, expansion paragraph, chapters scaffold starting at 00:00, your links block, a CTA and a hashtag line. Then the signature part: you edit it live next to a watch-page fold preview and a scored SEO checklist.
What is the fold preview?+
The watch page hides everything after roughly the first 150 characters behind "...more" — and search snippets quote the same slice. The fold preview renders exactly that slice as you type, with your keyword highlighted and a position bar showing how early it lands. If the hook dies at the fold, you see it before publishing, not after.
How is the SEO score calculated?+
Five deterministic checks, 100 points total: keyword inside the first 150 characters (30), valid chapters — 00:00 start, 3+ entries, ascending (25), 3–15 hashtags (20), a call to action (15) and at least one link (10). Every check updates live as you edit, with a hint explaining how to fix it.
Can I audit a description I already wrote?+
Yes — switch to 'Audit my description', paste it, set your target keyword and read the checklist. Nothing is generated or overwritten; it's the same fold preview and scoring the generator uses, pointed at your existing text.
What is the links block memory?+
Your socials/gear/affiliate links rarely change between videos. Save them once and the tool stores them in your browser (localStorage, never on our servers) and includes them in every future generation.