ミニアト

From a single photograph, we generate a 3:4 poster with "top half = original photo / bottom half = isometric illustration of miniature version of the subject." This is called the "Two Landscapes" format.

• No membership registration required. Select a photo, pay 480 yen, and download in about 2 minutes
• High resolution (1536×2048px). No watermarks or logos
• Full refund if you're not satisfied

Technical Details

• Cloudflare Workers + D1 + R2 only. We haven't built a single server
• Generation uses OpenAI gpt-image-2 (cost per image: 26 yen, actual time: 2 minutes)
• To avoid Workers' free tier CPU 10ms/request limit, we pass the 6MB JSON response directly to the browser without inspecting it, leaving parsing and base64 decoding to the browser
• Payment first. Generation costs only occur after payment, so the structure prevents operating at a loss
• A cron job every 5 minutes picks up "paid orders not yet generated" and automatically refunds them
• Completed data auto-deletes after 90 days. Unpaid uploads delete after 24 hours

I wrote about the background and design decisions on X.
https://x.com/hima_tsukuru/status/2091847714355245341?s=20