Description

• This tool displays the current User Agent string.
• The User Agent string is a specifically formatted description of the current operating system and web browser being used.

Facts

• User agents identify themselves to the network by sending an HTTP header containing information about the software and device they are running on.
• User agents can be web browsers, search engine crawlers, mobile apps, or any other type of software that communicates with a network.
• The information provided by a user agent includes the software name and version, the device type and operating system, and other details that help servers optimize content delivery.
• Web developers often use user agent detection to customize content and presentation for specific devices or software although more modern code uses feature detection logic instead.
• User agents can be used to block or filter certain types of traffic, such as unwanted bots or malicious software.
• User agent strings can vary between different versions of the same software, leading to compatibility issues between different devices and networks.
• User agent data can be collected and analyzed to gain insights into user behavior, demographics, and preferences.
• The HTTP specification does not specify a limit on the size of a User Agent but most web servers limit the HTTP header size.