Structure & Planning Free · AI · genre-aware

Book Description Generator

Describe your book — free AI drafts two genre-aware Amazon descriptions. Optional cover resize stays in your browser.

All tools About & FAQ Template blurb (no AI) Book title generator KDP formatter
Free AI drafts two store-ready descriptions — 8 free runs per connection, no cap on Pro and Ultra. Cover uploads stay in your browser.
free AI weights recent buyer trends in this genre so your copy feels current — not generic.

0 / 4500 · 40+ characters required

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Example: from pitch to Amazon book description

Illustrative opening lines. The generator returns two complete versions — hook-first and character-first — for you to edit.

Pitch (romantic suspense)A forensic accountant hiding from her past falls for the small-town sheriff investigating the embezzlement she uncovered.Hook-first: “She found the missing two million in an afternoon. Hiding from the people who took it will take everything she has.”
Pitch (LitRPG)A burned-out game tester wakes inside the beta he was paid to break — with every bug still in it.Character-first: “Ten years of finding bugs taught Theo one thing: every system breaks. Now his life depends on breaking this one first.”

Next: Blurb builder (no AI) · AI book title generator · AI book cover generator · KDP keyword generator · AI draft to KDP

About this tool

Your KDP product description is the sales page — it must hook browsers without sounding like a late-night infomercial. Enter your title, pick a genre, and describe your book in your own words. Kestrel — Free drafts two distinct descriptions (hook-first and character-first) weighted to how recent bestsellers in that genre open and pace their copy. Upload optional cover art to preview your listing and download a KDP-ready 1600×2560 JPEG resized in your browser.

What you can do

  • Two description variants — hook-first and character-first angles
  • Genre-aware pacing weighted to recent bestseller patterns in your category
  • Optional cover upload with local preview and KDP-sized 1600×2560 download
  • Copy-ready output for KDP description field — edit before publishing
  • Pairs with blurb builder, title length checker, and kindle-kdp-formatter
  • Kestrel — Free with several generations per connection
  • Cover resize runs in browser — only title, genre, and pitch sent for text generation

Planning tools and long-form structure

Novels fail when structure is improvised scene by scene. Beat sheets, chapter planners, and blurb builders help you decide pacing and reader promises before you spend tokens on prose. Pair these tools with an outline in Entangled Text so generation follows a spine.

AI book outline generator · AI novel writing workflow · Write a book with AI

How to use it

  1. Enter your book title and select the closest Amazon genre category.
  2. Paste a rough description — premise, protagonist, stakes, and tone (40+ characters).
  3. Optionally upload cover art for a local listing preview and KDP-sized download.
  4. Click Generate descriptions and compare hook-first and character-first variants.
  5. Copy your favorite into KDP — edit every word before publishing.

Tips for fiction authors

  • Give Kestrel — Free concrete story material: who wants what, what stands in the way, and what they could lose — not just "a thrilling adventure."
  • Pick the genre readers would search under on Amazon, not the subgenre only your critique group knows.
  • Amazon allows up to 4,000 characters in the description field — aim for 150–350 words of tight, vivid copy.
  • Use the blurb builder first for structure, then this tool to polish tone for your genre.
  • Review both variants and merge the strongest lines. Neither draft should ship unedited to KDP.

Related guides

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Common questions
Is this really free?

Yes. Guests get several free generations per connection via Kestrel — Free. Sign in to save drafts to your account.

How does genre trend awareness work?

Kestrel — Free receives guidance on emotional contract, trope appetite, and pacing patterns common in your selected genre — without copying any specific book.

Is my manuscript uploaded?

No. Only your title, genre, and short pitch are sent for description generation. Cover images stay in your browser unless you download the resized JPEG.

Why two descriptions?

Hook-first opens on tension or situation; character-first opens on voice or longing. Having both helps you find the right energy faster.

Will the copy sound AI-generated?

The tool avoids corny phrases and keyword stuffing, but you should still edit the result to match your voice before publishing on KDP.

What is the difference between a blurb and a book description?

Mostly where it is used. A blurb is the short back-cover copy; the book description is the Amazon product-page version, which can be longer and use a bold hook line. This generator writes the description; the blurb builder (/tools/blurb-builder) fills a no-AI back-cover template.

How long should an Amazon book description be?

KDP accepts up to 4,000 characters, but most fiction descriptions that sell run about 150–300 words: a hook line, two or three short paragraphs of situation and stakes, and a closing line. Shoppers on mobile see only the first few lines before "Read more", so the opening carries the most weight.

Can I use it for a book I have not finished?

Yes. It only needs the title, genre, and a short pitch in your own words, so you can draft the description early — many authors write it before the last chapters to keep the book on its promise.

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