The “My User Agent” page shows what your web browser sends in the "User-Agent" header for your HTTP requests.
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The user agent checker displays the string text your web browser sends in the "User-Agent" header in the HTTP requests. The user agent Information identifies your browser and operating system and its versions.
As we discussed earlier, there is no standard way to write the user-agent string. Therefore, dnchecker.org provides a tool to decode the user-agent string to figure out everything it's saying.
To perform the task, do the following steps.
In the back days, the internet was a manual command-based system. The user had to send the instructions to communicate. But since the evaluation of the internet, now the browsers do that job automatically.
There are more than 4.6 billion internet users worldwide, and we are always connected to the internet.
Without a browser, we cannot surf the internet. Browsers are the internet need. They are equipped with security policies, server agreements, and connectivity codes to run ideally. Generally, when the browser wants to connect with any website's server, it sends the user-agent info to connect.
I bet you are now thinking, "what is my user agent?" It's an intermediary or middleman between you and the internet world. Simply put, it's a string of text unique for each software or browser on the internet and holds the technical information about your device and operating system. User-agent is present in the HTTP headers when the browser wants to connect with the web server.
Each bit of the user agent contains some detailed information. However, there is no standard way to write the user-agent. It varies from browser to browser. Some browsers stuff the user-agent header with a lot of information.
Once a browser and web server connection is established, content negotiation begins. That lets the website serve its various versions depending upon the user-agent string. Once the user-agent passes its ID card to the web server, it provides the files, media, and scripts suitable for the particular user.
The user-agent string is not only helpful to us but also to the providers. It automatically sends the correct translation of certain documents based on the user's language preference. You may have seen this when accessing websites with a different language that is automatically translated.
To sum up, user-agent is used for different purposes, some of which are as follows.
Yes, you can change your user agent, and that process is called user-agent spoofing. Sometimes, we need to test different things. For example, you are running a campaign for MAC OS, and you want to figure out whether the campaign is running correctly for MAC OS and not targeting Linux users; changing the browser's user agent helps you in this regard.
Web developers usually daily change the user agent to check the progress of their website's behavior in different browsers and devices.
For switching the user agent, you can rely on a browser extension or use the developer console to manually change the user agent that your browser will send with its HTTP requests.
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