Web Browser User Agents
User agent strings are presented to web servers any time a device or browser connects to the webserver and requests a resource such as an image or html page. User agents can help you determine the population of your website users or help you determine if you should develop your website to fit different devices and screen sizes.
Your User Agent
Some Example User-Agents
| Windows User Agents | |
| Internet Explorer 7 (Windows Vista) | Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0) |
| Internet Explorer 6 (Windows XP) | Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) |
| Internet Explorer 5.5 (Windows 2000) | Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0 ) |
| Internet Explorer 5.5 (Windows ME) | Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; Win 9x 4.90) |
| Firefox 3.0 (Windows XP) | Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 |
| Firefox 2.0 (Windows XP) | Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14 |
| Google Chrome 0.2.149.29 (Windows XP) | Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.29 Safari/525.13 |
| Netscape 4.8 (Windows Vista) | Mozilla/4.8 [en] (Windows NT 6.0; U) |
| Netscape 4.8 (Windows XP) | Mozilla/4.8 [en] (Windows NT 5.1; U) |
| Opera 9.25 (Windows Vista) | Opera/9.25 (Windows NT 6.0; U; en) |
| Opera 8.0 (Windows 2000) | Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; en) Opera 8.0 |
| Opera 7.51 (Windows XP) | Opera/7.51 (Windows NT 5.1; U) [en] |
| Opera 7.5 (Windows XP) | Opera/7.50 (Windows XP; U) |
| Avant Browser | Avant Browser/1.2.789rel1 (http://www.avantbrowser.com) |
| Netscape 7.1 (Windows 98) | Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko Netscape/7.1 (ax) |
| Multizilla (Windows xp) | Mozilla/5.0 (Windows; U; Windows XP) Gecko MultiZilla/1.6.1.0a |
| Opera 7.5 (Windows ME) | Opera/7.50 (Windows ME; U) [en] |
| Netscape 3.01 gold (Windows 95) | Mozilla/3.01Gold (Win95; I) |
| Netscape 2.02 (Windows 95) | Mozilla/2.02E (Win95; U) |
| Mac OS User-Agents | |
| Safari 125.8 (MacintoshOSX) | Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.2 (KHTML, like Gecko) Safari/125.8 |
| Safari 85 (MacintoshOSX) | Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.2 (KHTML, like Gecko) Safari/85.8 |
| MSIE 5.15 (MacintoshOS 9) | Mozilla/4.0 (compatible; MSIE 5.15; Mac_PowerPC) |
| Firefox 0.9 (MacintoshOSX ) | Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7a) Gecko/20050614 Firefox/0.9.0+ |
| Omniweb563 (MacintoshOSX) | Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US) AppleWebKit/125.4 (KHTML, like Gecko, Safari) OmniWeb/v563.15 |
| Linux/Unix/Beos User-Agents | |
| Mozilla 1.6 (Debian) | Mozilla/5.0 (X11; U; Linux; i686; en-US; rv:1.6) Gecko Debian/1.6-7 |
| Epiphany (Linux) | Mozilla/5.0 (X11; U; Linux; i686; en-US; rv:1.6) Gecko Epiphany/1.2.5 |
| Epiphany (Ubuntu) | Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.7.3) Gecko/20050924 Epiphany/1.4.4 (Ubuntu) |
| Konqueror 3.5.10 (Kubuntu) | Mozilla/5.0 (compatible; Konqueror/3.5; Linux) KHTML/3.5.10 (like Gecko) (Kubuntu) |
| FireFox 2.0.0.19 (Ubuntu) | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.19) Gecko/20081216 Ubuntu/8.04 (hardy) Firefox/2.0.0.19 |
| Galeon 1.3.14 (Linux) | Mozilla/5.0 (X11; U; Linux; i686; en-US; rv:1.6) Gecko Galeon/1.3.14 |
| Konqueror 3 rc4 (Linux) | Konqueror/3.0-rc4; (Konqueror/3.0-rc4; i686 Linux;;datecode) |
| Konqueror (Gentoo) | Mozilla/5.0 (compatible; Konqueror/3.3; Linux 2.6.8-gentoo-r3; X11; |
| Firefox 0.8 (Linux) | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20050614 Firefox/0.8 |
| ELinks 0.9.3 (Kanotix) | ELinks/0.9.3 (textmode; Linux 2.6.9-kanotix-8 i686; 127x41) |
| Elinks (Linux) | ELinks (0.4pre5; Linux 2.6.10-ac7 i686; 80x33) |
| Links 2.1 (Linux) | Links (2.1pre15; Linux 2.4.26 i686; 158x61) |
| Links 0.9.1 (Linux) | Links/0.9.1 (Linux 2.4.24; i386;) |
| Opera 7.23 (Linux) | MSIE (MSIE 6.0; X11; Linux; i686) Opera 7.23 |
| Opera 9.52 | Opera/9.52 (X11; Linux i686; U; en) |
| Lynx 2.8.5rel.1 (Linux) | Lynx/2.8.5rel.1 libwww-FM/2.14 SSL-MM/1.4.1 GNUTLS/0.8.12 |
| w3m 0.5.1 (Linux) | w3m/0.5.1 |
| Links 2 (FreeBSD) | Links (2.1pre15; FreeBSD 5.3-RELEASE i386; 196x84) |
| Mozilla 1.7 (FreeBSD) | Mozilla/5.0 (X11; U; FreeBSD; i386; en-US; rv:1.7) Gecko |
| Netscape 4.77 (Irix) | Mozilla/4.77 [en] (X11; I; IRIX;64 6.5 IP30) |
| Netscape 4.8 (SunOS) | Mozilla/4.8 [en] (X11; U; SunOS; 5.7 sun4u) |
| Net Positive (BeOS) | Mozilla/3.0 (compatible; NetPositive/2.1.1; BeOS) |
| Search Spider User-Agents | |
| Googlebot 2.1 (New version) | Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) |
| Googlebot 2.1 (Older Version) | Googlebot/2.1 (+http://www.googlebot.com/bot.html) |
| Msnbot 1.0 (current version) | msnbot/1.0 (+http://search.msn.com/msnbot.htm) |
| Msnbot 0.11 (beta version) | msnbot/0.11 (+http://search.msn.com/msnbot.htm) |
| Yahoo Slurp | Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp) |
| Ask Jeeves/Teoma | Mozilla/2.0 (compatible; Ask Jeeves/Teoma) |
| scoutjet | Mozilla/5.0 (compatible; ScoutJet; +http://www.scoutjet.com/) |
Further Reading
The list above is obviously not complete as there are thousands of different user-agent strings. I found the following site very complete if you need a full list. udger.com/resources/ua-list/.