Cloudflare Workers documentation

Cloudflare Workers provides a serverlessOpen external link 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, ensure you have npm installedOpen external link, preferably using a Node version manager like VoltaOpen external link or nvmOpen external link to avoid permission issues, then run:

$ npm install -g @cloudflare/wrangler

or install with yarn:

$ yarn global add @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

Explore third-party packagesOpen external link that work on Workers, submitted by Cloudflare users.

Connect with the Workers community on DiscordOpen external link to ask questions, show off what you are building, and discuss the platform with other developers.

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

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