CrayonMill
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Built for Amazon KDP publishers

A coloring book factory for KDP publishers.

Pick an audience and a theme. We plan 40 topics, draw 40 pages at 300 DPI 1-bit, and hand you a print-ready PDF with the gutter KDP expects.

Start free — 4 pagesHow it works
Output
300 DPI · 1-bit
Gutter
Set by page count
Rights
Commercial, every plan
Failed pages
Credit refunded

Reference booksMade in-house · 2 books

Half colored cover, pages as they print

Two reference books made in-house — cover half colored, pages as they print.

Two reference books, made in-house

Made in-house with the same drawing model the studio uses, then traced to vector lines and laid out by hand. The studio exports 300 DPI 1-bit pages; vector tracing and these page layouts are not in the studio yet. Hover or tap a page to see an AI-colored example. See every book end to end →

Wild Mantras front cover: a lifelike owl inside a mandala, left half colored, right half left as line art
Front cover: left half colored by AI, right half as the pages come.

Reference book · made in-house · ages 12–15

Wild Mantras

Mandala Animals Coloring Book for Teens — 24 pages, 6 mandala worlds, 68 interior pages.

87 candidate drawings for 24 pages, every one picked by eye after a close-up anatomy check, then traced to vector lines. Each page carries a short mantra.

  • Tiger head framed by jungle leaves and mandala rings, mantra "My courage is quiet but strong"“My courage is quiet but strong”
  • Great horned owl on a branch inside a forest mandala, mantra "I trust my inner wisdom"“I trust my inner wisdom”

See the whole book: every page, the cover and the print check →

Wild Mantras · page 1 · vector line art (preview rasterized). Colored view: Example coloring by AI — the book pages are black-and-white line art.
Wild ABC front cover: a lion inside a mandala, left half colored, right half left as line art, under a rainbow title
Front cover: left half colored by AI, right half as the pages come.

Reference book · made in-house · ages 6–9

Wild ABC

Mandala Animals from A to Z — Learn, Trace & Color — 26 pages, 64 interior pages.

82 candidate drawings for 26 pages, every one picked by eye after a close-up anatomy check, then traced to vector lines. Each page teaches one letter: say it, trace it, color it, and read the affirmation.

  • Letter L page: a lion head inside a mandala, trace-it letters and the affirmation "I am loving"“I am loving”
  • Letter O page: an octopus inside a mandala, trace-it letters and the affirmation "I am outstanding"“I am outstanding”

See the whole book: every page, the cover and the print check →

Wild ABC · page 1 · vector line art (preview rasterized). Colored view: Example coloring by AI — the book pages are black-and-white line art.

40 prompts, or 3 choices

Most generators give you a prompt box. A 40-page book means 40 prompts, 40 downloads and a separate PDF tool. CrayonMill treats the book as the unit of work.

The usual way

  1. a friendly fox reading under an oak tree, thick clean outlines, no shading
  2. a hedgehog carrying apples on its back, simple background
  3. two rabbits sharing a picnic blanket, bold lines
  4. an owl on a branch at dusk, no gray
  5. … 36 more

Then download 40 PNGs and build the PDF yourself.

CrayonMill

01
Who?Kids · 8–11 · medium lines (overridable)
02
ThemeForest friends
03
Size40 art pages · 8.5 × 11 in · single-sided

Topics planned for you. One style across the book. PDF built and checked.

The check that catches what Amazon would — before you upload

Six checks read the book's real state. The download button stays locked until every one passes.

  • All pages ready40 / 40
  • 1-bit — no gray pixelsguaranteed by the cleaning pipeline
  • Page count within the supported range40 art · 80 interior · 24–300
  • Inside margin (gutter)0.375 in · 80 interior pages
  • Outer safe margin0.375 in · 113 px
  • Resolution2550 × 3300 · 300 DPI

KDP recommends 300 DPI and flags gray or low-resolution line art. We never ship either.

2550 × 3300pixels on every page: 300 DPI at 8.5 × 11 in, by construction
0.375 / 0.5 ingutter set from interior page count, automatically
1 credit= 1 page. Failed pages refunded. Regenerate: same topic, new seed

Numbers from the studio showcase books, not a brochure

  • 25 real books
  • 600 pages drawn
  • 153 min median per book
  • 94% passed first time

“Passed first time” means the reviewer raised no flag on the first draw. Median time includes queue waits when many books were queued at once. Counted from the showcase data as of 2026-09-10. How we count these →

Pay per page, no subscription

1 credit = 1 page. Your first 4 pages are free, exporting the PDF never costs credits, and pages that fail our checks are refunded. Commercial rights on every plan.

See credit packs

Questions

What do the first 4 free pages include?

Full-resolution, watermark-free pages from your first book. The PDF and the remaining pages use credits.

Do I own the pages?

Yes. Commercial rights on every plan, including the free pages.

What if a page fails?

It shows a failed badge, the credit comes back, and you regenerate it with one tap.

Which trim size?

8.5 × 11 in, 24–300 interior pages, single- or double-sided, with the gutter KDP expects for that page count.