Cloudflare Workers documentation

Cloudflare Workers provides a serverless execution environment that allows you to create entirely new applications or augment existing ones without configuring or maintaining infrastructure.

Get started    View the tutorials

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​Installing the Workers CLI

To install wrangler, the Workers CLI, ensure you have npm installed, then run:

$ npm install -g @cloudflare/wrangler

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​Playground

View this “Hello World” example in the Workers playground:

addEventListener("fetch", event => {  event.respondWith(handleRequest(event.request))})
async function handleRequest(request) {  return new Response("Hello world")}

Launch playgroundOpen external link    Learn more

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​Popular pages

• Learning: How Workers works – learn how Cloudflare’s global network powers Workers
• Pricing – learn about the Free and Bundled plans
• Reference: HTMLRewriter – parse and transform HTML from inside a Worker
• Limits – learn about plan limits (e.g. free plans get 100,000 req/day)

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