HTTP User Agent in Internet Browsers

Knowing the UserAgent ID strings used by crawlers and browser can be useful for various purposes. Browsers and search engine crawlers usually identify themselves through a HTTP user agent ID string field.

Some websites use the user agent string ID to detect if the visitor is a specific browser or search engine crawler. The http user agent id string field allows websites to check and detect browser and versions; this information can be used to output different html and content.

You can also use the underneath HTTP user agent strings in our desktop crawler and sitemapper software tools to test how your own website behaves when exposed to different browsers and robots.