AI book writing software

Write a book with AI — from outline to launch.

Start from a chapter-by-chapter book outline, draft each chapter with an AI writing assistant that works on the section you're in, then export to EPUB, PDF, DOCX, or Markdown. When it's done, publish and sell it with paid tiers and a built-in paywall — one workspace from a blank page to a bookstore-ready file.

Start from a chapter-by-chapter outline

Begin with a book-outline scaffold — premise plus a chapter skeleton — so you're filling in structure instead of staring at a blank page.

Draft with an AI writing assistant

Expand a chapter, rewrite a paragraph, tighten the prose, or continue where you left off — the AI works on the section you're in, grounded in what you've already written.

Export bookstore-ready files

Turn your manuscript into EPUB, PDF, DOCX, or Markdown in one step, so the file you hand to a store or a beta reader matches the book you wrote.

Publish and sell it

Publish a finished book, gate it behind paid tiers, or paywall it past a free preview — your readers buy access to the work without you wiring up a store.

Repurpose into launch copy

Spin the finished book into promo posts and short-form snippets with one AI pass, so a launch announcement comes out of the manuscript instead of a second writing project.

Free to start

Open a workspace and start outlining for free — no credit card to draft your first chapters and try the AI writing tools.

Frequently asked questions

Can I write a whole book in JustJot.ai?

Yes — start from a chapter-by-chapter book outline, draft each chapter with the AI writing assistant, and keep the entire manuscript in one workspace from the first outline to the finished export.

What formats can I export my book to?

You can export to EPUB, PDF, DOCX, or Markdown, so the file is ready to hand to a store, a print service, or a beta reader without reformatting it by hand.

Does the AI write the book for me?

The AI assistant works alongside you — it expands, rewrites, tightens, or continues the section you're in, grounded in your own outline and prose. You stay the author and steer every chapter rather than accepting a one-shot generated manuscript.

Can I sell the book I write?

Yes — publish a finished book and gate it behind paid tiers or a per-book paywall with a free preview, so readers buy access to your work directly without you building a separate storefront.

Outline, draft, export, and sell — all in one workspace.

Free to start. Your book, your chapters, your launch.

Get started free