Building an IP Checker Page with Cloudflare Workers

In this blog post, we will explore how to create an IP checker page using Cloudflare Workers. Cloudflare Workers provide a serverless execution environment that allows you to run JavaScript code at the edge of the Cloudflare network. By leveraging Workers, we can build a simple and efficient IP checker page that provides information about the visitor’s IP address.


Before we dive into the implementation, make sure you have the following:

  • A Cloudflare account: Sign up for a free account if you don’t have one already.
  • A text editor or integrated development environment (IDE) to write code.
  • Basic knowledge of JavaScript.

Getting Started

Create a new Cloudflare Worker

  1. Log in to your Cloudflare account and navigate to the “Workers” section.
  2. Click on “Create a Worker” to create a new worker.
  3. Give your worker a name, such as “IPCheckerPage.”
  4. Copy the code from the provided GitHub repository and paste it into the worker editor.

Understanding the code

The code provided in the GitHub repository is a basic implementation of an IP checker page. It uses the Cloudflare Workers API to fetch the client’s IP address and display it on a simple HTML page.

Customize the HTML page

  • Modify the HTML content within the const html variable to match your desired layout and design.
  • Feel free to add additional information or styling to enhance the page’s appearance.

Please change the fav icon linked in the header before using my code, thanks.

Deploy the worker

  1. Save the worker code and click on the “Save and Deploy” button to deploy it.
  2. Cloudflare will provide you with a unique URL for your worker. This URL will serve as the IP checker page.

Test the IP checker page

  • Visit the provided URL in your web browser.
  • You should see the IP address displayed on the page.


By utilizing Cloudflare Workers, we have successfully built an IP checker page that fetches and displays the client’s IP address. Cloudflare Workers offers a simple and cost-effective solution for running serverless code at the edge of the network.

Remember to explore the Cloudflare Workers documentation for more advanced features and possibilities.

This post is licensed under CC BY 4.0 by the author.