The KDP coloring book maker that makes the whole book
Coloring books, activity books and puzzle books for Amazon KDP: the pages, a print-ready interior PDF, a wrap cover with the right spine width and a listing ready to paste — in one Windows app, from your idea to the files you upload.
Interior, cover and listing: the KDP kit
When your pages are ready, press "Make KDP kit". GizmoBloom follows KDP's rules for you and makes a folder with everything to upload.
- Trim sizes 8.5 × 11, 8.5 × 8.5, 8 × 10 and 6 × 9 inches — tick several and each size becomes its own paperback
- White or cream paper with black ink, or color ink: the spine width and the printing cost follow your choice
- The interior PDF, with the inside margin for your page count, bleed on or off, and coloring pictures on one side only (markers do not ruin the next picture)
- The cover PDF: back, spine and front at the exact size for your page count, with a white box where KDP prints the barcode, and spine text from 80 pages
- The printing cost and your royalty per book, with a price that leaves you about $2 or more
- The Amazon A+ pictures and the front cover as a picture, for your book's page on Amazon
Coloring books, activity books, puzzle books
Choose the kind of book, the age and the theme: GizmoBloom writes the page plan, or you use your own ideas.
- Coloring books for kids, from PreK: thick, simple lines for little hands
- Adult coloring books: detailed patterns and mandalas for calm coloring
- Activity books: tracing, counting, matching, cut and paste, mazes and bingo, with pictures of your theme
- Story books: a picture and a few lines of text on every page
- Study workbooks: formulas, unit conversions and equations, with the answers computed
- Every book gets a cover, a "This book belongs to" page, page numbers and your own last pages
- Books in French or Spanish too, with their own listing and the Amazon stores of their language
A puzzle book maker, with answer keys Works offline
The puzzles are made by GizmoBloom itself, on your computer: no AI account and no internet needed.
- Sudoku, word search, crossword, mazes, word scramble and coordinate grids
- Puzzle books for teens and adults — and mazes, word search and sudoku pages in activity books for kids
- Word puzzles use the words of your theme: an ocean book gets ocean words
- The answer keys are added at the end of the book
The pictures: your ChatGPT or Gemini, even on free plans
GizmoBloom writes the prompt for every picture and opens it in your own ChatGPT or Gemini, in your browser. When you download a picture, it goes to its page by itself. Link several accounts and they all draw at the same time — that is how free plans make a whole book.
- Clean black lines for coloring pages, ready to print
- A picture library: every picture you keep can be used again in your next books
- Picture sheets: one picture holds 6 or 9 small clip arts for activity pages, cut apart for you
- Auto books: choose a theme, an age and a size, and GizmoBloom plans a series of different activity books
A KDP listing written from your real book
Every field of KDP's form, in its order, in one text file — change anything you like.
- Title and subtitle with your main keyword first, a description with KDP's bold text and lists, the 7 keyword boxes, categories and reading age
- An SEO check: title and subtitle within 200 characters, all 7 boxes filled, each box 50 characters or less, no word repeated across boxes
- Words to check in Amazon's search box, to see what buyers really type
- Learn from an Amazon book: copy the page of a best-selling book like yours and get ideas for yours — the size, the page count to match or beat, a price, keyword words that fit your book (never its title) and categories to try
- KDP's question about AI-generated content, with the answer for your book
- A warning on brands, characters and famous names
How to make a KDP coloring book with GizmoBloom
Start a new book
Choose the kind of book, the age and the theme. GizmoBloom writes the page plan — or type your own page ideas.
Make the pictures
Your lanes make the pictures in your ChatGPT or Gemini, and each one goes to its page. Puzzles and activity pages are made by GizmoBloom itself.
Make the KDP kit
Choose the sizes and the paper: the interior PDF, the cover PDF and the listing are made for you.
Publish on KDP
Paste the listing into KDP's form, upload the two PDFs and look at every page in KDP's previewer. GizmoBloom never logs in to your account.
Questions about KDP books
Is GizmoBloom an AI coloring book generator?
It works with the AI you already have. GizmoBloom writes the prompts and opens them in your own ChatGPT or Gemini — free plans work — and puts every picture you download on its page. The puzzles, activity pages, covers, PDFs and listings are made by GizmoBloom itself.
Which KDP trim sizes can I make?
8.5 × 11, 8.5 × 8.5, 8 × 10 and 6 × 9 inches. Tick several and each size gets its own interior and cover, ready to publish as its own paperback.
What does KDP need for a coloring book?
A paperback of at least 24 pages, an interior PDF at the trim size with the right margins, and a cover PDF with the spine width for your page count and paper — with spine text only from 80 pages. GizmoBloom makes both PDFs to these rules and shows the spine width, the cover size and the printing cost before you upload.
Does it make the cover with the spine?
Yes: one PDF with the back, the spine and the front, at the exact size for your page count and paper, with bleed and a white box where KDP prints the barcode.
Can I sell the books I make?
Yes, the books you make are yours to sell. Pictures made with ChatGPT or Gemini follow their own terms, which allow you to use your pictures. KDP asks whether a book has AI-generated content: the listing file has the answer for your book.
Does GizmoBloom upload my book to KDP?
No: it never logs in to your KDP account. It prepares the files and the listing, and you upload them yourself in a few minutes.
Do I need Photoshop or another design program?
No. GizmoBloom lays out the pages, the cover and the PDFs itself. You need a Windows 10 or 11 computer, Chrome or Edge, and a ChatGPT or Gemini account for the pictures.
Make your first KDP book free
Try every feature for 3 days, no card needed. Files made during the trial carry a small SAMPLE mark.
Selling T-shirts too? See the T-shirt mockup generator.