How to Use User Agent String Detection on Your Website

User agent string detection is a technique that allows web developers to serve different content to users based on their devices, browsers, and operating systems. By examining the user agent string of a user’s browser, a web server can determine the capabilities of the browser and device being used to access the website, and serve content that is tailored to those capabilities.

In this post, we’ll explain how to use user agent string detection on your website, including the pros and cons of using this technique and some tips for implementing it effectively.

How User Agent String Detection Works

User agent string detection works by examining the user agent string that is sent by a user’s browser to the web server when a request is made for a web page. The server then uses this information to determine the capabilities of the browser and device, and serve content accordingly.

For example, if a user is accessing a website from a mobile device using a browser with a small screen and limited processing power, the server might serve a simplified version of the website that is optimized for mobile devices. On the other hand, if the user is accessing the website from a desktop computer with a high-resolution display and powerful processing capabilities, the server might serve a more feature-rich version of the website.

To implement user agent string detection on your website, you’ll need to write code that examines the user agent string of a user’s browser and uses this information to serve the appropriate content. This can be done using a variety of programming languages and tools, such as PHP, Python, or JavaScript.

Pros and Cons of Using User Agent String Detection

Like any technique, user agent string detection has its pros and cons. Some of the benefits of using this technique include:

However, there are also some potential drawbacks to using user agent string detection, including:

Tips for Implementing User Agent String Detection

If you decide to use user agent string detection on your website, here are some tips to help you implement it effectively:

Use APIC Agent API: There are a variety of libraries and tools available that can help you parse and analyze user agent strings more easily. These can save you time and effort, and help ensure that your code is accurate and up-to-date. However, using APIC Agent API is the simplest way of doing it. Here is how you can do that in Python

import requests
import json

# Make a request to the APIC Agent API
response = requests.get(

# Check for a successful response
if response.status_code == 200:
   # Get the JSON data from the response
   json_data = response.json()

   # Print the JSON data
  print("Request failed with status code", response.status_code)

Test thoroughly: Make sure to test your user agent string detection code thoroughly to ensure that it is working correctly and serving the appropriate content to users. This can involve using a tool to simulate requests from different devices and browsers, or testing the code