📌 CORS Proxy Server

CORS Proxy Server is a simple and efficient proxy server built with Node.js and Express.js to fetch headers and HTML content from any URL, bypassing CORS restrictions. It comes with a user-friendly front-end interface. Live Demo

✨ Features

• Handles CORS (Cross-Origin Resource Sharing) requests
• Fetch headers and HTML content from any URL
• Simple UI built with Tailwind CSS
• Deployable on Vercel, Render, and other platforms
• Improved error handling and redirection support

📂 Repository Structure

/cors-proxy-server
│-- public/
│   └── index.html  # Frontend UI
│-- server.js       # Node.js backend server
│-- package.json    # Dependencies and scripts
│-- vercel.json     # Vercel deployment configuration
│-- README.md       # Documentation
│-- LICENSE         # License

Installation

🔹 Prerequisites

• Node.js (v16 or higher)
• Yarn or NPM

🔹 Clone the Repository

git clone https://github.com/AsifKamboh-COM/cors-proxy-server.git
cd cors-proxy-server

🔹 Install Dependencies

Using Yarn:

yarn install

Using NPM:

npm install

🔹 Start the Server

yarn start

or

npm start

Usage

Once the server is running, you can use the proxy by making a request to:

http://localhost:3000/proxy?url=<TARGET_URL>

Example:

http://localhost:3000/proxy?url=https://example.com

This will return:

• Response status (e.g., HTTP/2 200 OK)
• Response headers (all headers from the target URL)
• Full HTML content of the requested page

Deployment

🔹 Deploy on Vercel

To deploy this CORS Proxy Server on Vercel, follow these steps:

1. Fork or clone the repository.

2. Install Vercel CLI if not already installed:

   npm install -g vercel

3. Login to Vercel:

   vercel login

4. Navigate to the project directory and deploy:

   vercel

   Follow the instructions to complete the deployment.

🔹 Deploy on Render

1. Push your code to GitHub
2. Create a new Web Service on Render
3. Connect your GitHub repository
4. Set the build command:

   yarn install

5. Set the start command:

   yarn start

6. Deploy and get your Render URL!

Environment Variables (Optional)

You can configure the following environment variables:

• PORT (default: 3000)

Error Handling

If you get the error:

{
  "status": "Failed to fetch URL",
  "error": "Invalid URL"
}

Possible Fixes:

• Make sure the target URL is publicly accessible.
• If the request is blocked due to CORS, try using different headers.
• Some sites have anti-bot protections, which may cause failures.

License

This project is licensed under the MIT License.

Built & Maintained By

Asif Kamboh – Developer & Open-Source Contributor