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 startedView the tutorials

​Installing the Workers CLI

To install wranglerOpen external link, the Workers CLI, ensure you have npm installedOpen external link, preferably using a Node version manager like nvmOpen external link. Then, run:

$ npm install -g @cloudflare/wrangler

Read more about installing wrangler.

​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 linkLearn more

​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)

​Community

You can connect with the Workers community on DiscordOpen external link to ask questions, show off what you’re building, and discuss the platform with other developers.

Follow @CloudflareDev on TwitterOpen external link to learn about product announcements, new tutorials, and what's new in Cloudflare Workers.

These docs are built with the Cloudflare Docs EngineOpen external link.