LineArt

LineArt turns one photo into a printable, multi-page coloring book. Upload a photo of your pet, kid or family, pick a realistic or cartoon line-art style, and get a whole book where the same subject is drawn consistently in different fun scenes, delivered as print-ready PDF and PNG pages in minutes. The problem: store-bought coloring books are generic, and drawing custom pages of your own pet or family by hand takes hours. Most photo-to-coloring tools only make one page at a time; LineArt keeps the subject recognizable across a full book, which makes it a real personalized gift or keepsake. How it's made: a full-stack TypeScript app running on the edge. Generation runs as a pipeline that drafts the book's scenes, renders each page with AI image models and keeps the subject consistent across pages. Stack: React 19, TanStack Start, Cloudflare Workers, D1, R2, Drizzle ORM, Better Auth, and AI image models via fal.ai. Pricing: 20 free credits on sign-up (no credit card), then one-time credit packs from $9. No subscription, and every plan includes a commercial license.