Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"""geo"":\{""type"":""Point"",""coordinates"":\[(?P<latitude>[^,\]\}]+),(?P<longitude>[\d\.\-]+)"; string input = @"{""created_at"":""Thu Jul 16 04:46:24 +0000 2015"",""id"":621541368599457792,""id_str"":""621541368599457792"",""text"":""k imma shower and gn \n\ud83d\ude2a matthew have fun wwith your \""fans \"" babe \ud83d\udc94"",""source"":""\u003ca href=\""http:\/\/twitter.com\/download\/iphone\"" rel=\""nofollow\""\u003eTwitter for iPhone\u003c\/a\u003e"",""truncated"":false,""in_reply_to_status_id"":null,""in_reply_to_status_id_str"":null,""in_reply_to_user_id"":null,""in_reply_to_user_id_str"":null,""in_reply_to_screen_name"":null,""user"":{""id"":2842045238,""id_str"":""2842045238"",""name"":""d-u-y-e-n"",""screen_name"":""_duyxnny_"",""location"":""\u2708\ufe0friverside,california - "",""url"":""http:\/\/twitter.com\/_duyxnny_\/status\/610692899173302273"",""description"":""im ugly ..."",""protected"":false,""verified"":false,""followers_count"":605,""friends_count"":368,""listed_count"":9,""favourites_count"":19255,""statuses_count"":15125,""created_at"":""Mon Oct 06 06:24:26 +0000 2014"",""utc_offset"":-25200,""time_zone"":""Pacific Time (US & Canada)"",""geo_enabled"":true,""lang"":""en"",""contributors_enabled"":false,""is_translator"":false,""profile_background_color"":""3B94D9"",""profile_background_image_url"":""http:\/\/pbs.twimg.com\/profile_background_images\/598623992367304705\/IsZyk_eZ.jpg"",""profile_background_image_url_https"":""https:\/\/pbs.twimg.com\/profile_background_images\/598623992367304705\/IsZyk_eZ.jpg"",""profile_background_tile"":true,""profile_link_color"":""9266CC"",""profile_sidebar_border_color"":""000000"",""profile_sidebar_fill_color"":""000000"",""profile_text_color"":""000000"",""profile_use_background_image"":true,""profile_image_url"":""http:\/\/pbs.twimg.com\/profile_images\/621199859144495105\/G8x0fMV-_normal.jpg"",""profile_image_url_https"":""https:\/\/pbs.twimg.com\/profile_images\/621199859144495105\/G8x0fMV-_normal.jpg"",""profile_banner_url"":""https:\/\/pbs.twimg.com\/profile_banners\/2842045238\/1436912478"",""default_profile"":false,""default_profile_image"":false,""following"":null,""follow_request_sent"":null,""notifications"":null},""geo"":{""type"":""Point"",""coordinates"":[33.958571,-117.434168]},""coordinates"":{""type"":""Point"",""coordinates"":[-117.434168,33.958571]},""place"":{""id"":""6ba08e404aed471f"",""url"":""https:\/\/api.twitter.com\/1.1\/geo\/id\/6ba08e404aed471f.json"",""place_type"":""city"",""name"":""Riverside"",""full_name"":""Riverside, CA"",""country_code"":""US"",""country"":""United States"",""bounding_box"":{""type"":""Polygon"",""coordinates"":[[[-117.523867,33.85216],[-117.523867,39.79369],[-84.097028,39.79369],[-84.097028,33.85216]]]},""attributes"":{}},""contributors"":null,""retweet_count"":0,""favorite_count"":0,""entities"":{""hashtags"":[],""trends"":[],""urls"":[],""user_mentions"":[],""symbols"":[]},""favorited"":false,""retweeted"":false,""possibly_sensitive"":false,""filter_level"":""low"",""lang"":""en"",""timestamp_ms"":""1437021984611""}"; Match m = Regex.Match(input, pattern); Console.WriteLine("'{0}' found at index {1}", m.Value, m.Index); } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx