Loading page
About this tool
Build a structured AI storytelling prompt with narrative arc, point of view, tone and pacing controls baked in.
The Storytelling Prompt Builder turns a one-line premise into a complete fiction-writing prompt with a real narrative arc, point of view, tone, pacing and ending baked in. It structures the story around classic frameworks — Syd Field's three-act structure, the Campbell/Vogler Hero's Journey, Freytag's pyramid or kishōtenketsu — and adds craft constraints such as show-don't-tell and consistent viewpoint. It is built for writers, hobbyists and game designers who want AI story drafts with proper structure instead of meandering output.
Open Storytelling Prompt Builder on AltFTool — it loads instantly in your browser.
Paste or type the text you're working with.
Choose how it should be transformed or analyzed.
Copy the finished text into your document or post.
Three-act, Hero's Journey, Freytag's pyramid and kishōtenketsu, each expanded into concrete numbered beats.
The prompt enforces a single point of view, a held tone, chosen pacing and show-don't-tell rules.
Choose a resolved, ambiguous or fairly-clued twist ending instead of letting the model default to a tidy wrap-up.
Give the model a premise, a structure and constraints — not just a topic. A strong storytelling prompt names the narrative arc with its beats (for example the three-act structure: setup ending in an inciting incident, confrontation with a midpoint reversal, then climax and resolution), fixes the point of view and tone, and adds craft rules like showing emotion through action rather than naming it. This builder assembles all of that from your inputs.
The three-act structure divides a story into setup (about the first quarter, ending in an inciting incident), confrontation (about half the story, with escalating obstacles and a midpoint reversal) and resolution (the final quarter, containing the climax). It was formalised for screenwriting by Syd Field in his 1979 book Screenplay and is the most widely taught story shape in Western fiction and film.
Kishōtenketsu is a four-part East Asian narrative structure — ki (introduction), shō (development), ten (twist) and ketsu (conclusion) — that builds a story around an unexpected recontextualisation rather than around conflict. Unlike the three-act structure, it does not require an antagonist or escalating obstacles, which makes it well suited to quiet, twist-driven short fiction.
Flash fiction is usually capped at 1,000 to 1,500 words, while most markets define a short story as roughly 1,500 to 7,500 words — the SFWA, for instance, classes anything under 7,500 words as a short story for its awards. This builder targets about 1,000 words for flash, 3,000 for a standard short story and 6,000 for a long short story.