Welcome to Cloudflare

Explore guides and tutorials to start building on Cloudflare's platform

Build with Cloudflare

 Run Workerexport default {  async fetch(request) {    const html = `<!DOCTYPE html>		<body>		  <h1>Hello World</h1>		  <p>This markup was generated by a Cloudflare Worker.</p>		</body>`;
    return new Response(html, {      headers: {        "content-type": "text/html;charset=UTF-8",      },    });  },
};

 Run Workerexport default {  async fetch(request) {    const data = {      hello: "world",    };
    return Response.json(data);  },
};

 Run Workerexport default {  async fetch(request) {    /**     * Replace `remote` with the host you wish to send requests to     */    const remote = "https://example.com";
    return await fetch(remote, request);  },
};

 Run Workerexport default {  async fetch(request) {    const destinationURL = "https://example.com";    const statusCode = 301;    return Response.redirect(destinationURL, statusCode);  },
};

 Run Workerexport default {  async fetch(request) {    async function MethodNotAllowed(request) {      return new Response(`Method ${request.method} not allowed.`, {        status: 405,        headers: {          Allow: "GET",        },      });    }    // Only GET requests work with this proxy.    if (request.method !== "GET") return MethodNotAllowed(request);    return fetch(`https://example.com`);  },
};

Learn more about Workers >

Developer Platform

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

Create API Tokens

If you are going to be using the Cloudflare API, you first need an API token to authenticate your requests.

Create Tokens >

View Workers Examples

Review fully functional sample scripts to get started with Workers.

View Examples >

Install the WARP Client

The Cloudflare WARP client allows individuals and organizations to have a faster, more secure, and more private experience online.

Get started >

Set up a tunnel

Cloudflare Tunnel provides you with a secure way to connect your resources to Cloudflare without a publicly routable IP address.

Set up a tunnel >

Zero Trust

Cloudflare Zero Trust replaces legacy security perimeters with our global network, making the Internet faster and safer for teams around the world.

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Install an Origin CA certificate

Use Origin Certificate Authority (CA) certificates to encrypt traffic between Cloudflare and your origin web server and reduce origin bandwidth consumption.

Install Origin CA >

Change your nameservers

Make Cloudflare your primary DNS provider by updating your authoritative nameservers at your domain registrar.

Update nameservers >

SSL/TLS Encryption mode

Your domain's SSL/TLS encryption mode controls how Cloudflare connects to your origin web server and how SSL certificates presented by your origin will be validated.

Set encryption mode >

Create IP access rules

Use IP Access rules to allowlist, block, and challenge traffic based on the visitor’s IP address, country, or Autonomous System Number (ASN).

Create IP access rules >