Here you will find a list of the most common user agents. This directory include the user agents for both popular web browsers and various robots. These robots include search engine spiders and content fetchers like the Facebook share bot.

User Agent strings are and were never meant to be parsed by machines. They were simply meant to identify clients in server logs. You should avoid using these strings in web development as best you can. I personally use them to record browsers and platforms that visit websites I work with. Even this data is not too reliable, but gives an overall view of trends.

How to Read a User Agent String

The following list of UA strings are just a sampling. There are literally thousands of strings, so never check a UA using an exact match. For example, Firefox alone has over 2000 versions. Each user agent string that comes from a web browser will tell you what browser it is, what version, and also the operating system that it’s running on.

Look for the letters MSIE to identify a version of Internet Explorer. For instance, MSIE 7.0 means the browser is Internet Explorer 7. Firefox places its version numbers near the end of the string, such as Firefox/3.5. You can easily identify the operating system as well. Windows will show Windows NT 5.1 for XP, Windows NT 6.0 for Vista, and Windows NT 6.1 for Win7. Mac always says Mac. Linux always says Linux.

Firefox

 
User Agent Strings Platform
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.6) Gecko/20070725 Firefox/2.0 Firefox 2.0.0.6, Win XP
Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.0.15) Gecko/2009101601 Firefox 2.1 (.NET CLR 3.5.30729) Firefox 2.1, Win Vista
Mozilla/6.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:2.0.0.0) Gecko/20061028 Firefox/3.0 Firefox 3.0, Mac OSX
Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.0 Firefox 3.0, Win XP
Mozilla/5.0 (Windows; U; Windows NT 6.1; pl; rv:1.9.1) Gecko/20090624 Firefox/3.5 (.NET CLR 3.5.30729) Firefox 3.5, Win 7
Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2) Gecko/20100115 Firefox/3.6 Firefox 3.6, Win 7
Mozilla/5.0 (Windows; U; Windows NT 6.1; pl; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Firefox 3.6.3, Win 7
See more Firefox User Agent Strings here  

Internet Explorer

 
User Agent Strings Platform
Mozilla/4.0 (compatible; MSIE 5.0; Windows NT 5.1; .NET CLR 1.1.4322) IE 5, Win XP
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322) IE 6, Win XP
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30) IE 7, Win XP
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1) IE 7, Win Vista
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; en-GB) IE 8, Win XP
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; MS-RTC LM 8) IE 8, Win Vista
(Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)) IE 8, Win 7
See more Internet Explorer User Agent Strings here  

Opera

 
User Agent Strings Platform
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en) Opera 8.0 Opera 8.0, Win XP
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en) Opera 8.50 Opera 8.5, Win XP
Opera/9.00 (Windows NT 5.1; U; en) Opera 9.0, Win XP
Opera/9.20 (Windows NT 6.0; U; en) Opera 9.2, Win Vista
Opera/9.30 (Nintendo Wii; U; ; 2047-7;en) Opera 9.3, Nintendo Wii
Opera 9.4 (Windows NT 6.1; U; en) Opera 9.4, Win 7
Opera/9.99 (Windows NT 5.1; U; pl) Presto/9.9.9 Opera 9.9.9, Win XP
See more Opera User Agent Strings here  

Google Chrome

 
User Agent Strings Platform
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_6; en-US) AppleWebKit/530.5 (KHTML, like Gecko) Chrome/ Safari/530.5 Chrome Beta, Mac OSX
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/1.0.154.42 Safari/525.19 Chrome 1, Win Vista
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/528.8 (KHTML, like Gecko) Chrome/2.0.156.0 Safari/528.8 Chrome 2, Win XP
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/531.3 (KHTML, like Gecko) Chrome/3.0.193.0 Safari/531.3 Chrome 3, Win Vista
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/4.0.202.0 Safari/532.0 Chrome 4, Win Vista
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/4.0.202.0 Safari/532.0 Chrome 4, Win 7
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/532.9 (KHTML, like Gecko) Chrome/5.0.307.1 Safari/532.9 Chrome 5, Win 7
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.2 (KHTML, like Gecko) Chrome/6.0 Chrome 6, Win 7
See more Chrome User Agent Strings here  

Safari

 
User Agent Strings Platform
Mozilla/5.0 (iPod; U; CPU iPhone OS 2_2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Mobile/5H11 Safari, iPhone OS2
Mozilla/5.0 (Linux; U; Ubuntu; en-us) AppleWebKit/525.13 (KHTML, like Gecko) Version/2.2 Firefox/525.13 Safari 2.2, Linux
Mozilla/5.0 (Macintosh; U; Intel Mac OS X; de-de) AppleWebKit/522.11.1 (KHTML, like Gecko) Version/3.0.3 Safari/522.12.1 Safari 3, Mac OSX
Mozilla/5.0 (Windows; U; Windows NT 5.1; fr-FR) AppleWebKit/523.15 (KHTML, like Gecko) Version/3.0 Safari/523.15 Safari 3, Win XP
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/523.15 (KHTML, like Gecko) Version/3.0 Safari/523.15 Safari 3, Win Vista
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_5_2; en-gb) AppleWebKit/526+ (KHTML, like Gecko) Version/3.1 iPhone Safari 3.1, iPhone
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.25 (KHTML, like Gecko) Version/3.2 Safari/525.25 Safari 3.2, Mac OSX
Mozilla/5.0 (Windows; U; Windows NT 6.0; ru-RU) AppleWebKit/528.16 (KHTML, like Gecko) Version/4.0 Safari/528.16 Safari 4, Win Vista
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_7; en-us) AppleWebKit/533.4 (KHTML, like Gecko) Version/4.1 Safari/533.4 Safari 4.1, Mac OSX
Mozilla/5.0(iPad; U; CPU iPhone OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B314 Safari/531.21.10 Safari 4, iPhone OS3
See more Safari User Agent Strings here  

PlayStation 3

 
User Agent Strings Platform
Mozilla/4.0 (PS3 (PlayStation 3); 1.00) Playstation 3 1.0
Mozilla/5.0 (PLAYSTATION 3; 2.00) Playstation 3 2.00

Facebook

 
User Agent Strings
facebookexternalhit/1.0 ( http://www.facebook.com/externalhit_uatext.php)
facebookscraper/1.0(+http://www.facebook.com/sharescraper_help.php)

GoogleBot

 
User Agent Strings Version
Googlebot/2.1 ( http://www.googlebot.com/bot.html) Googlebot 2.1 – web results
Googlebot-Image/1.0 ( http://www.googlebot.com/bot.html) Googlebot Image 1.0 – image results

Ask.com

 
User Agent Strings
Mozilla/2.0 (compatible; Ask Jeeves)

MSN and Bing.com

 
User Agent Strings
msnbot-media/1.0 (+http://search.msn.com/msnbot.htm)
msnbot-media/1.1 (+http://search.msn.com/msnbot.htm)
MSNBOT_Mobile MSMOBOT Mozilla/2.0 (compatible; MSIE 4.02; Windows CE; Default)
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; livebot-searchsense/0.1; +http://search.msn.com/msnbot.htm)
msnbot/1.0 (+http://search.msn.com/msnbot.htm)
msnbot/1.1 (+http://search.msn.com/msnbot.htm)
msnbot-Products/1.0 (+http://search.msn.com/msnbot.htm)