Turn any image into a
Color by number book
in seconds.
Upload, pick a mosaic style, export a print-ready PDF. Built for KDP creators.
No credit card · 10 free credits every month
8 mosaic patterns, one coloring book
Every pattern tiles perfectly at 8.5 × 11 in — switch styles per page or let Auto cycle through them all.
Clean grid layout — the universal standard for any subject or style.
Staggered circular cells — soft and approachable, great for portraits.
Rotated squares add geometric energy and visual depth to the page.
Honeycomb structure — a favourite for nature scenes and macro shots.
Interlocking jigsaw pieces — turns every page into an activity.
Alternating 8-pointed stars and cross tiles — striking geometric art.
Overlapping arcs inspired by traditional Japanese koi scale patterns.
Zigzag columns with herringbone rhythm — architectural and distinctive.
Auto mode — mix all 8 patterns across pages automatically for varied, magazine-quality coloring books.
Fits inside KDP print area
Every converted image is automatically padded with a white border on all 4 sides, keeping artwork inside the safe zone — no content bleeds into the margin.
Zero KDP content violations
Mosaci never embeds trademarks, stock watermarks, or third-party copyrighted elements. What you upload is exactly what gets converted — clean output, every time.
Print-ready at 8.5 × 11 in
PDF pages are sized at exactly 8.5 × 11 in — the standard KDP interior trim — so you can upload directly without any resizing or reformatting.
Three steps to a finished book
Upload images
Drag in up to 100 PNGs or JPGs — single shots or an entire themed folder at once.
Pick pattern & palette
Choose one of 10 grid styles per page and tune cell size and color count to your audience.
Export PDF / ZIP
Assemble a print-ready coloring book in one click, or download every page individually.
From photo to color by number
Watch the conversion — or drag to explore each stage.
Stay productive and publish your book
without leaving the tool
Credits that scale with your catalog
Starter
Top up and go
- 100 generation credits
- All mosaic styles & themes
- High-res PNG + 300 DPI PDF export
- Credits never expire
Creator
Best value for active use
- 500 generation credits
- All mosaic styles & themes
- High-res PNG + 300 DPI PDF export
- Credits never expire
- 13% lower per-credit cost
Publisher
Volume pricing for bulk work
- 2,000 generation credits
- All mosaic styles & themes
- High-res PNG + 300 DPI PDF export
- Credits never expire
- 28% lower per-credit cost
Loved by KDP creators
Join thousands of authors publishing coloring books with Mosaci.
I went from a folder of stock photos to a 120-page coloring book on KDP in an afternoon. Mosaci handles the part I used to dread.
The numbered page export is pixel-perfect. My customers love how clean the final PDF looks. Worth every penny.
Tried 3 other tools before this one. Mosaci is the only one that actually nails the palette — colors feel hand-picked, not random.
Published 6 coloring books in 2 months. The batch workflow saves me hours. This is my secret weapon for KDP low-content.
The honeycomb and diamond patterns are gorgeous. My adult coloring book audience is obsessed with the results.
Customer support is fast and the tool just keeps getting better. Best investment for my KDP business this year.
I went from a folder of stock photos to a 120-page coloring book on KDP in an afternoon. Mosaci handles the part I used to dread.
The numbered page export is pixel-perfect. My customers love how clean the final PDF looks. Worth every penny.
Tried 3 other tools before this one. Mosaci is the only one that actually nails the palette — colors feel hand-picked, not random.
Published 6 coloring books in 2 months. The batch workflow saves me hours. This is my secret weapon for KDP low-content.
The honeycomb and diamond patterns are gorgeous. My adult coloring book audience is obsessed with the results.
Customer support is fast and the tool just keeps getting better. Best investment for my KDP business this year.
I upload my own illustrations and the color-by-number output is incredibly clean. Saves me so much manual work.
The PDF export is print-ready out of the box. No fiddling with bleed settings or margins. Just upload and go.
Mosaci turned my travel photography into a whole series of destination coloring books. Concept to published in a weekend.
The mosaic styles add so much variety to my catalog. Square, circle, diamond — each looks like a completely different product.
Clean UI, fast exports, beautiful output. This is what a professional tool should feel like.
I was skeptical about the auto-palette but it nailed my nature photos perfectly. The colors are so vibrant and accurate.
I upload my own illustrations and the color-by-number output is incredibly clean. Saves me so much manual work.
The PDF export is print-ready out of the box. No fiddling with bleed settings or margins. Just upload and go.
Mosaci turned my travel photography into a whole series of destination coloring books. Concept to published in a weekend.
The mosaic styles add so much variety to my catalog. Square, circle, diamond — each looks like a completely different product.
Clean UI, fast exports, beautiful output. This is what a professional tool should feel like.
I was skeptical about the auto-palette but it nailed my nature photos perfectly. The colors are so vibrant and accurate.
- Definition
What is Mosaci Studio?
Mosaci Studio is a web-based SaaS application that converts photos into mosaic coloring pages and color-by-number artwork. Users upload a photograph, select a geometric mosaic grid style, and export a print-ready PDF suitable for Amazon KDP publishing, Etsy digital downloads, classroom worksheets, or personal use. No design skills or software installation is required.
Frequently asked questions
What is Mosaci Studio?
Mosaci Studio is a web-based SaaS application that converts photos into mosaic coloring pages and color-by-number artwork. You upload a photo, choose a mosaic style, and export a print-ready PDF — no design experience needed.
What is a mosaic coloring page?
A mosaic coloring page is a coloring sheet where the image is divided into a geometric grid — such as hexagons or squares — with each cell numbered according to a color key. The artist fills in each cell to reveal the original image in a mosaic tile style.
What is a color-by-number?
Color-by-number is a technique where an image is divided into sections, each labeled with a number that corresponds to a specific color. The artist matches each number to its color, gradually revealing the full picture. It is a popular format for adult coloring books and educational activities.
How does photo-to-coloring-page conversion work?
Mosaci analyzes your uploaded photo, reduces it to a clean color palette, divides it into a geometric grid, and assigns a number to each cell based on its color. The result is a numbered coloring page with an automatic color key, exported as a print-ready PDF.
Is Mosaci free to use?
Yes. Mosaci is pay-per-use — no subscription. Every account gets 10 free credits every month with no credit card required. Buy a credit pack when you need more; purchased credits never expire.
Can I use Mosaci to publish coloring books on Amazon KDP?
Yes. Mosaci exports print-ready PDFs sized and formatted for Amazon KDP paperback interiors, making it straightforward to self-publish coloring books.
What file formats can I upload?
Mosaci accepts JPG, PNG, and WebP images. For best results, use clear photos with good contrast and a well-defined subject.
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Turn your photos into coloring books that sell
No design skills needed. Upload a photo, pick a style, export a print-ready PDF — ready for KDP in minutes.