No worries, these are fair points and I appreciate the honest feedback.
You're right - there are millions of coloring pages out there already. I thought about this too.
On the environmental cost: if no one uses it, I'll simply shut it down to save resources. That's a practical reality check. But if people do use it, then at least it means I've contributed something to kids' entertainment and education.
That said, my long-term vision isn't just "another coloring page site powered by AI." I'm working on integrating more interactive AI features - things like kids describing what they want and getting personalized pages, or uploading their own drawings to transform into coloring sheets. I want this to be something genuinely new and useful, not just a pile of AI-generated images competing with Google Image Search.
Whether I succeed at that differentiation remains to be seen, but that's the goal. Thanks for sharing your perspective - it's a good reminder to stay focused on creating real value, not just more content.
Great suggestions! I love the B2B angle - weekly themed PDFs for schools/organizations is something I hadn't fully considered.
For now keeping it free to build user base, but definitely thinking about premium tiers for:
- Custom theme uploads
- Organization licensing
- Curriculum-specific content
The Cloudflare crawl protection is a good call too. Already using R2, so makes sense to add that layer.
Thanks for the thoughtful ideas - this is exactly why I posted here!
Thanks! I use Gemini's Imagen 3 API with specific prompts emphasizing "black and white line art, coloring book style, simple clean outlines, no shading".
Key is being very explicit about:
- Line art only, no shading/gradients
- Age-appropriate complexity
- Theme-specific keywords
Biggest challenge was consistency - took many iterations to dial in the prompts. I also manually filter out images with unwanted shading (working on automating this).
Happy to discuss more if you're exploring similar ideas!
Great minds think alike! I'm actually working on this feature right now - adding AI-colored reference versions alongside the line art. It should be live very soon. Thanks for the feedback, and I hope your daughter enjoys the current pages!
I built a free printable coloring pages website for kids, powered by AI generation.
The Fun Part:
Almost all the code was generated by Windsurf with Claude Sonnet 4.5. This was an interesting experiment - I never thought I could actually pull this off. It's fascinating to see what's possible with AI-assisted development today.
Background:
As a parent, I noticed my kids love coloring, but most online resources are either low quality or require paid subscriptions. So I built this using AI to provide high-quality coloring pages for free to all parents.
Core Features:
- AI-generated high-quality line art (powered by Google Gemini)
- 50+ themed categories (animals, holidays, nature, etc.)
- Age-appropriate content (3-12 years) with difficulty levels
- One-click PDF download, print-ready
- Multi-language support (English, Chinese, etc.)
- User favorites and browsing history
Tech Stack:
- Next.js 16 + React 19
- Drizzle ORM + PostgreSQL
- MeiliSearch for search
- Cloudflare R2 for image storage
- Google Gemini AI for content and category generation
- Tailwind CSS + shadcn/ui
Interesting Challenges:
1. AI category consistency - Built a "memory system" to make AI reuse existing categories instead of creating duplicates
2. Image optimization - Using Next.js Image optimization with preloading strategy, LCP < 1.5s
3. SEO - Implemented structured data and multilingual sitemaps, now indexed 500+ pages on Google
Future Plans:
- Custom AI generation from user prompts (text-to-coloring-page)
- Image upload to generate coloring pages (image-to-coloring-page)
- User upload and sharing features
Feel free to try it out and share your feedback! I'd especially love to hear suggestions on technical implementation and product direction.
The source code is not open-sourced yet, but happy to discuss technical details.