Cloudflare launches Worker Previews for isolated branch testing

Cloudflare has launched Worker Previews, giving each Git branch an isolated, production-like Worker environment with its own URL, configuration, observability, and state.

Developers can deploy with npx wrangler preview, use a stable branch URL, inspect logs, errors, metrics, and traces, and optionally use a custom domain for production-like auth and redirect flows.

Each Preview receives separate Durable Object namespaces and Container applications, while base configuration can be copied and overridden for individual branches without changing production.