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About this tool
Creates video script prompts from runtime: word count at 150 wpm, a 15-second hook, chapter timings and retention beats.
The YouTube Script Prompt Builder converts a target runtime into a full script prompt: word count at the standard 150 words-per-minute narration pace, a 15-second hook, timed chapters with per-chapter word budgets, retention beats every ~45 seconds and a 20-second outro with a single CTA. It is built for creators and video teams who script before they shoot and want the draft to actually fit the runtime.
Open YouTube Script Prompt Builder on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Words are budgeted at 150 wpm spoken, so a 10-minute script arrives at roughly 1,500 words instead of an unrecordable 3,000.
The prompt schedules a pattern interrupt every ~45 seconds and requires each one marked [BEAT] so the editor knows where the visual changes go.
Each chapter gets a start time computed from the plan, ready to paste into the YouTube description as chapter markers.
About 1,500 words at the standard 150 words-per-minute conversational narration pace — the figure this tool uses. Fast narrators reach 160+ wpm and deliberate ones drop to 130, so treat 150 as the scripting baseline and adjust after a read-through.
About 15 seconds — roughly 38 spoken words. YouTube's own creator guidance says viewers decide whether to keep watching within the first moments, so the generated prompt bans channel intros and 'welcome back' openers and puts the payoff or problem in the first line.
A deliberate change that re-earns attention: a visual switch, an open question, or a preview of a payoff still coming. Practitioner guidance is one every 30-60 seconds; this tool schedules one every 45 seconds of body content and has the model mark each as [BEAT] in the script.
100 characters is YouTube's hard limit, though titles get cut around 60-70 characters in many search and suggested-video layouts. The generated prompt asks for three title options under 100 characters each, with the payoff stated early in the title.