GoKawiilDeveloper builds spam-resistant 11ty contact form using Cloudflare Workers and reCAPTCHA v3
A blogger detailed how they replaced their static site's contact form backend with Cloudflare Pages Functions, combining reCAPTCHA v3 (or optionally Cloudflare Turnstile) with the Resend email service to block spam submissions. The setup collects a visitor's name, email and message, then routes it through a Worker to a custom email address for filtering. The approach was inspired by a prior migration guide from Netlify to Cloudflare by developer Sia Karamalegos.
GoKawiil's interpretation of the reporting above, not reported fact.
Static sites built with tools like 11ty have no native backend to process form submissions, so developers must rely on serverless functions to handle tasks like email delivery and spam filtering. This walkthrough offers a concrete, low-cost pattern for adding dynamic functionality to otherwise static, JAMstack-style websites without abandoning their performance and simplicity benefits.
- Cloudflare Pages Functions can add serverless backend logic to static Eleventy sites without a traditional server.
- reCAPTCHA v3 or Cloudflare Turnstile can be paired with Resend to filter spam before sending contact emails.
- The author has iterated through five different contact form solutions over the years, reflecting ongoing tradeoffs in static site tooling.
O'Reilly "Learning Serverless" by Jason Katzer — If tinkering with Cloudflare Workers and serverless contact forms is your thing, this O'Reilly book digs into designing, developing and deploying serverless functions properly. It's a great companion for going beyond a single form handler into robust edge architectures.
See O'Reilly "Learning Serverless" by Jason Katzer on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: nooshu.com — Matt Hobbs, 2026-09-02
Published there as: “Using Cloudflare Workers and reCAPTCHA v3 for a Static Site Contact Form”
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