What is a User Agent and Why Do You Need One?

Every time your web browser connects to a website, it sends a piece of text called a User Agent (UA). This string identifies your browser, operating system, and device type to the web server. For example, a server can use the User Agent to serve a mobile-friendly version of a site to an iPhone, and the full desktop version to a Windows PC.

As a developer, tester, or web scraping enthusiast, you often need to simulate requests from different devices. Generating realistic, up-to-date User Agents is crucial for testing website responsiveness, bypassing blocks, and gathering data effectively.

Today, I'm sharing a powerful yet simple tool that generates realistic User Agents for a variety of modern devices and browsers. And the best part? You can run it directly from this blog post!

Run the User Agent Generator Live

Click the "Run" (▶) button below to start the script. You will be prompted to enter your choices in the output window on the right.

How to Use the Interactive Tool

1. Click the large "Run" (▶) button at the top of the interactive window.
2. The console on the right will display a welcome banner and ask if you want to customize the output. Type y (for yes) or n (for no) and press Enter.
3. Follow the on-screen prompts to choose the platform (Windows, iPhone, Android, etc.), browser, and the number of User Agents you want to generate.
4. The script will then print the generated User Agents directly into the console for you to copy.
5. The script also saves the output to a paste site.

Feel free to use the generated User Agents in your projects. If you have any questions or suggestions for new devices to add, let me know in the comments below!