ユーザーエージェント

一般にユーザーエージェント（User Agent）とは情報にアクセスする手段のことを表すが、特にWebにおいてユーザーエージェントと称する場合はHTTPユーザーエージェント（HTTP_USER_AGENT）のこと、あるいはそれらを識別する名称文字列のことを指す。

HTTPユーザーエージェントにはブラウザやウェブクローラーなどがあり、HTTPユーザーエージェントはHTTPリクエストの際にユーザーエージェント毎に決められた識別名称文字列を送信する。この文字列はハードウェア情報、携帯キャリア名、ホストOS名、アプリケーション名、レンダリングエンジン名、バージョンナンバーなどで構成されており、各エージェントにとって最適な情報や反応の取得に役立つ一方、ユーザエージェント文字列には厳密な構文の決まりはなく、ブラウザの発展やシェア争いの過程で文字列が複雑に変化したり、仕様上、エージェントからの自己申告による実装スタンスであるため、ユーザエージェントを偽装することが可能である。

HTTPユーザーエージェント文字列は以下のメソッドで取得する。

　JavaScript ： navigator.userAgent
　perl ： $ENV{'HTTP_USER_AGENT'}
　php ： $_SERVER['HTTP_USER_AGENT']

ユーザーエージェント出力例一覧

以下は各環境におけるユーザーエージェント文字列の一例です。実際にはOSやメジャー・マイナーバージョンにより文字列のバリエーションは無数に存在します。

Windows ブラウザ

Google Chrome

Chrome 36: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36NEW

Chrome 20: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11

Chrome 14: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.187 Safari/535.1

Chrome 12: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.100 Safari/534.30

Chrome 9: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.19 Safari/534.13

Apple Safari

Safari 5: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja-JP) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0 Safari/533.16

Mozilla Firefox

Firefox 30.0: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0NEW

Firefox 14.0: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1

Firefox 7.0: Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20100101 Firefox/7.0.1

Firefox 4.0: Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0

Firefox 3.6: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10 ( .NET CLR 3.5.30729)

Firefox 3.0: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 ( .NET CLR 3.5.30729; .NET4.0E)

Opera

Opera 22: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 OPR/22.0.1471.70NEW

Opera 11: Opera/9.80 (Windows NT 5.1; U; ja) Presto/2.7.62 Version/11.00

Opera 10: Opera/9.80 (Windows NT 5.1; U; ja) Presto/2.6.30 Version/10.63

MS Internet Explorer

Internet Explorer 11: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; rv:11.0) like GeckoNEW

Internet Explorer 9: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Internet Explorer 9: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)

Internet Explorer 8: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6.6; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Internet Explorer 7: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; GTB6.6; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Internet Explorer 6: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; GTB6.6; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Mac ブラウザ

Google Chrome

Chrome 36: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36NEW

Chrome 35: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36

Chrome 33: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.117 Safari/537.36

Chrome 23: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11

Chrome 20: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11

Chrome 8: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.231 Safari/534.10

Apple Safari

Safari 7: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.77.4 (KHTML, like Gecko) Version/7.0.5 Safari/537.77.4NEW

Safari 5: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; ja-jp) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5

Safari 4: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_5; ja-jp) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7

Safari 3.2: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_5; ja-jp) AppleWebKit/525.27.1 (KHTML, like Gecko) Version/3.2.1 Safari/525.27.1

Mozilla Firefox

Firefox 30.0: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0NEW

Firefox 15.0: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:15.0) Gecko/20100101 Firefox/15.0.1

Firefox 14.0: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:14.0) Gecko/20100101 Firefox/14.0.1

Firefox 3.6: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; ja-JP-mac; rv:1.9.2.7) Gecko/20100713 Firefox/3.6.7

Opera

Opera 22: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 OPR/22.0.1471.70NEW

Opera 11: Opera/9.80 (Macintosh; Intel Mac OS X 10.6.5; U; ja) Presto/2.7.62 Version/11.00

Opera 10: Opera/9.80 (Macintosh; Intel Mac OS X; U; ja) Presto/2.6.30 Version/10.63

Apple iPhone Mobile Safari

iOS 7.1.1: Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Version/7.0 Mobile/11D201 Safari/9537.53NEW

iOS 7.0.6: Mozilla/5.0 (iPhone; CPU iPhone OS 7_0_6 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11B651 Safari/9537.53

iOS 6.0.1: Mozilla/5.0 (iPhone; CPU iPhone OS 6_0_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A525 Safari/8536.25

iOS 5.1.1: Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3

iOS 5: Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3

iOS 5b6 （ベータ版）: Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A5274d Safari/7534.48.3

iOS 4.3.5: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5

iOS 4.3.3: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5

iOS 4.3.2: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5

iOS 4.2: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5

iOS 4: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7

iOS 3.1: Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1 like Mac OS X; ja-jp) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7C144 Safari/528.16

iOS 3: Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X;ja-jp AppleWebKit/528.18 (KHTML,like Gecko) Version/4.0 Mobile/7A341 Safari/528.16

iOS 2: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5A347 Safari/525.20

Apple iPhone Simulator Mobile Safari

iOS 7.1: Mozilla/5.0 (iPhone; CPU iPhone OS 7_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Version/7.0 Mobile/11D167 Safari/9537.53

iOS 4.2: Mozilla/5.0 (iPhone Simulator; U; CPU iPhone OS 4_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C134 Safari/6533.18.5

※ なぜかiPhone Simulatorが自己主張

Apple iPad Mobile Safari

iOS 5.1.1: Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3

iOS 5: Mozilla/5.0 (iPad; CPU OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3

iOS 4.3.3: Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J3 Safari/6533.18.5

iOS 4.2: Mozilla/5.0 (iPad; U; CPU OS 4_2_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5

iOS 3.2: Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10

Apple iPod Touch Mobile Safari

iOS 4: Mozilla/5.0 (iPod; U; CPU iPhone OS 4_0 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7

iOS 3: Mozilla/5.0 (iPod; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16

Apple iPhone Chrome

Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_2 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) CriOS/36.0.1985.49 Mobile/11D257 Safari/9537.53 (000258)

Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_1 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) CriOS/35.0.1916.41 Mobile/11D201 Safari/9537.53 (000049)

Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_1_1 like Mac OS X; ja-jp) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3 (DF962A1B-45F5-489A-9386-03BDDC9123F2)

Apple iPhone Mercury

Mozilla/5.0 (iPhone; CPU iPhone OS 6_0_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mercury/7.4.2 Mobile/10A523 Safari/8536.25

Android Mobile Safari

Android 4

Xperia Z Ultra Android 4.2.2: Mozilla/5.0 (Linux; U; Android 4.2.2; ja-jp; SonySOL24 Build/14.1.K.1.217) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

Nexus 10 Android 4.3: Mozilla/5.0 (Linux; Android 4.3; Nexus 10 Build/JWR66Y) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.72 Safari/537.36

Nexus 7 Android 4.3: Mozilla/5.0 (Linux; Android 4.3; Nexus 7 Build/JWR66Y) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.72 Safari/537.36

GALAXY S4 SC-04E Android 4.2.2: Mozilla/5.0 (Linux; Android 4.2.2; ja-jp; SC-04E Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Version/1.0 Chrome/18.0.1025.308 Mobile Safari/535.19

Galaxy S III SC-06D Android 4.1.2: Mozilla/5.0 (Linux; U; Android 4.1.2; ja-jp; SC-06D Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

Galaxy S III SC-06D Android 4.0.4: Mozilla/5.0 (Linux; U; Android 4.0.4; ja-jp; SC-06D Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

Nexus S Android 4.0.4: Mozilla/5.0 (Linux; U; Android 4.0.4; ja-jp; Nexus S Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

Android 3

Optimus Pad L-06C Android 3.0.1: Mozilla/5.0 (Linux; U; Android 3.0.1; ja-jp; L-06C Build/HRI66) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13

Android 2.3

Nexus S Android 2.3.4: Mozilla/5.0 (Linux; U; Android 2.3.4; ja-jp; Nexus S Build/GRJ22) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Galaxy S SC-02B Android 2.3.3: Mozilla/5.0 (Linux; U; Android 2.3.3; ja-jp; SC-02B Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Xperia arc SO-01C Android 2.3.1: Mozilla/5.0 (Linux; U; Android 2.3.2; ja-jp; SO-01C Build/3.0.D.2.79) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Nexus S Android 2.3.2: Mozilla/5.0 (Linux; U; Android 2.3.2; ja-jp; Nexus S Build/GRH78C) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Android 2.2

Galaxy S SC-02B Android 2.2: Mozilla/5.0 (Linux; U; Android 2.2; ja-jp; SC-02B Build/FROYO) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Nexus One Android 2.2: Mozilla/5.0 (Linux; U; Android 2.2; ja-jp; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

HTC Desire Android 2.2: Mozilla/5.0 (Linux; U; Android 2.2; ja-jp; X06HT Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1

Android 2.1

REGZA Phone T-01C Android 2.1: Mozilla/5.0 (Linux; U; Android 2.1-update1; ja-jp; T-01C Build/TER018) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

Xperia SO-01B Android 2.1: Mozilla/5.0 (Linux; U; Android 2.1-update1; ja-jp; SO-01B Build/2.0.B.0.138) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

HTC Desire Android 2.1: Mozilla/5.0 (Linux; U; Android 2.1-update1; ja-jp; HTCX06HT Build/ERE27) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

IS03 Android 2.1: Mozilla/5.0 (Linux; U; Android 2.1-update1; ja-jp; IS03 Build/RA201) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

Android 1.6

Xperia SO-01B Android 1.6: Mozilla/5.0 (Linux; U; Android 1.6; ja-jp; SonyEricssonSO-01B Build/R1EA018) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1

HT-03A Android 1.6: Mozilla/5.0 (Linux; U; Android 1.6; ja-jp; Docomo HT-03A Build/DRD08) AppleWebKit/528.5+(KHTML, like Gecko) Version/3.1.2 Mobile Safari/ 525.20.1

Android 1.5

HT-03A Android 1.5: Mozilla/5.0 (Linux; U; Android 1.5; ja-jp; HT-03A Build/CDB72) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1

Android Chrome

GALAXY S4 SC-04E Android 4.2.2: Mozilla/5.0 (Linux; Android 4.2.2; SC-04E Build/JDQ39) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.131 Mobile Safari/537.36

Mozilla/5.0 (Linux; Android 4.2.2; SC-04E Build/JDQ39) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.169 Mobile Safari/537.22

BlackBerry

BlackBerry: BlackBerry9000/4.6.0.224 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/220

Windows Mobile

Windows Mobile: Mozilla/4.0 (Compatible; MSIE 6.0; Windows NT 5.1 T-01A_6.5; Windows Phone 6.5)

ユーザーエージェント

ユーザーエージェント

ユーザーエージェント 出力例 一覧

Windows ブラウザ

Google Chrome

Apple Safari

Mozilla Firefox

Opera

MS Internet Explorer

Mac ブラウザ

Google Chrome

Apple Safari

Mozilla Firefox

Opera

Apple iPhone Mobile Safari

Apple iPhone Simulator Mobile Safari

Apple iPad Mobile Safari

Apple iPod Touch Mobile Safari

Apple iPhone Chrome

Apple iPhone Mercury

Android Mobile Safari

Android 4

Android 3

Android 2.3

Android 2.2

Android 2.1

Android 1.6

Android 1.5

Android Chrome

BlackBerry

Windows Mobile

関連情報

ユーザーエージェント出力例一覧