Guides
Architecture, spam checks, and working code for contact forms, waitlists, and uploads on a static site.
The architecture, the spam essentials, and why the widget alone is not enough.
Working Worker code: Siteverify, validation, and a D1 inbox.
What still works on Netlify, and how to replace it when you move.
One Worker endpoint, plus the partials and fetch script to hook it up.
A 2026 cost comparison, and when a hosted inbox is still worth it.
Position in line, shareable codes, and what to store (and not store).
Type checks, safe keys, size caps, and when to use presigned URLs.
Formharbor is a $19 one-time kit: contact forms, referral waitlists, and file uploads on your Cloudflare free tier.
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