Color by Number Generator for KDP
Turn any image or a built-in design into a printable color-by-number coloring page. Each region gets a number keyed to a colour, with a matching answer key — export the whole book as a print-ready PDF for Amazon KDP.
- Licensed for commercial use
- KDP-ready print PDF
- No royalties
Plans from $9/mo · cancel anytime
Any image becomes a puzzle
Upload a picture, use one of your AI images, or pick a built-in mandala or geometric design.
Numbered regions + colour key
We trace clean outlines, number each region, and build a colour legend automatically.
Print-ready PDFs
Every export pairs the numbered page with a coloured answer key, sized for KDP.
Why not use a free generator?
Free generators are fine for a worksheet or a rainy afternoon. A book you sell on Amazon KDP needs the right to sell it, and pages made for print.
Typical free generator
- Often for personal or classroom use only, so selling what you make can break the terms
- Downloads made for screens, not for print
- Not sized for KDP trim sizes and margins
Publish Aid
- Licensed for commercial use: sell on Amazon KDP or anywhere else
- No royalties or per-book fees
- Print-ready PDFs sized for Amazon KDP
How it works
- 1
Choose your artwork: upload an image, pick an AI image, or a built-in design.
- 2
Tune the number of colours, detail, and smoothness until it reads cleanly.
- 3
Preview the page and answer key, then download the print-ready PDF.
Ready to build your puzzle book?
Sign in to generate print-ready interiors and export them as a PDF in minutes.
Plans from $9/mo · cancel anytime
Frequently asked questions
Can I sell the color-by-number books I create?
Yes. Commercial use is included: everything you generate and export is yours to publish and sell on Amazon KDP or any other platform, with no royalties or per-book fees.
What kinds of images work best?
Bold, simple images with flat colours convert most cleanly. AI illustrations and the built-in designs are the most reliable; busy photos may need fewer colours and lower detail.
Does the PDF include the answers?
Each puzzle can include a coloured answer-key page plus a numbered colour legend, so colourists always know which colour goes where.
Do I need an account to use the generator?
You can browse this page without an account, but generating and exporting requires signing in and credits.
Can I use designs from a free online generator in a book I sell?
Check its license first. Many free generators allow personal or classroom use only, so putting what they make into a book you sell can break their terms. Their downloads are usually sized for screens rather than print, too. Everything you create in Publish Aid is licensed for commercial use and exported as a print-ready PDF sized for Amazon KDP.