I built a film camera simulator in a single HTML file here's how

Launched today: faxoffice1987.com — 8 film cameras simulated in Canvas 2D. The constraints I set myself: One HTML file No build step, no dependencies, no npm install Runs offline from a USB drive No backend, no account, no uploads The hard part: per-pixel color science. Each film stock (Tri-X, Portra, Velvia, Neopan Acros) has its own render path. Not a filter on top — a decision at the pixel level. Stack: Vanilla JS, Canvas 2D Cloudflare Pages + Functions (share links, license validation) Polar