Subject: Worker works in debugger but not on site

Direct Response

Thanks for the details. If your Worker works in the debugger but not in production, common issues include:

1. Route mismatch — check the Worker route covers the domain/path (e.g., example.com/*).
2. Version mismatch — confirm the published Worker matches the one tested in the debugger.
3. Cache interference — some requests may be served from cache without hitting the Worker if configured incorrectly.
4. Environment differences — ensure the Worker is deployed in Production, with correct KV or Secrets bindings.

Thought Process

The debugger always runs the Worker against test traffic. In production, Workers only execute if the route matches real requests. Checking routes and bindings ensures the code is properly applied.

Tools Used

• Cloudflare Dashboard (Workers) — to confirm route, version, and bindings.
• curl -I — to test requests and check headers for Worker execution.
• wrangler CLI — to publish and log Worker activity.