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.sh for checkout
• localStorage for state

Pricing experiment: $29 one-time. No subscription. 1 camera free forever.

Would love architecture feedback especially on the color science approach.

Link: https://faxoffice1987.com