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
No Match

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"{[^}{]*?""content"":[^}{,]*?(imgur\.com)[^}{,]*?,[^}{]*?""from"":[^}{,]*?(ken_8520)[^}{,]*?,[^}]*?}"; string input = @"{""id"": ""1508640338717"", ""displayName"": null, ""originalarrivaltime"": ""2017-10-25T14:08:57.128Z"", ""messagetype"": ""RichText"", ""version"": 1508640338717, ""content"": ""<a href=\""https://i.imgur.com/RTzSZiY.jpeg\"">https://i.imgur.com/RTzSZiY.jpeg</a><e_m ts=\""1508940494\"" ts_ms=\""1508940494784\"" a=\""live:ken_8520\"" t=\""61\""/>"", ""conversationid"": ""8:markv"", ""from"": ""8:live:ken_8520"", ""properties"": null, ""amsreferences"": null}, {""id"": ""1508454757179"", ""displayName"": null, ""originalarrivaltime"": ""2017-10-23T10:29:14.857Z"", ""messagetype"": ""RichText"", ""version"": 1508454757179, ""content"": ""<a href=\""https://i.imgur.com/hhSOfJu.jpeg\"">https://i.imgur.com/hhSOfJu.jpeg</a><e_m ts=\""1508754504\"" ts_ms=\""1508754504997\"" a=\""live:ken_8520\"" t=\""61\""/>"", ""conversationid"": ""8:markv"", ""from"": ""8:live:ken_8520"", ""properties"": null, ""amsreferences"": null}, {""id"": ""1508405154918"", ""displayName"": null, ""originalarrivaltime"": ""2017-10-14T18:19:13.66Z"", ""messagetype"": ""RichText"", ""version"": 1508405154918, ""content"": ""<a href=\""https://i.imgur.com/u1QFzVu.gif\"">https://i.imgur.com/u1QFzVu.gif</a>"", ""conversationid"": ""8:markv"", ""from"": ""8:live:ken_8520"", ""properties"": null, ""amsreferences"": null}, {""id"": ""1515194882829"", ""displayName"": null, ""originalarrivaltime"": ""2018-01-05T20:41:19.069Z"", ""messagetype"": ""RichText"", ""version"": 1515194882829, ""content"": ""<a href=\""https://i.imgur.com/IxcxW.gif\"">https://i.imgur.com/IxcxW.gif</a>"", ""conversationid"": ""8:markv"", ""from"": ""8:live:ken_8520"", ""properties"": { ""urlpreviews"": ""[{\""key\"":\""https://i.imgur.com/IxcxW.gif\"",\""value\"":{\""url\"":\""https://i.imgur.com/IxcxW.gif\"",\""size\"":\""499834\"",\""status_code\"":\""200\"",\""content_type\"":\""image/gif\"",\""site\"":\""i.imgur.com\"",\""category\"":\""generic\"",\""favicon\"":\""https://neu1-urlp.secure.skypeassets.com/static/imgur-16x16.ico\"",\""favicon_meta\"":{\""width\"":16,\""height\"":16},\""thumbnail\"":\""https://neu1-urlp.secure.skypeassets.com/img1/48c8cb02-cbff-4f3a-b7da-2c140a8d1b24.gif\"",\""thumbnail_meta\"":{\""width\"":216,\""height\"":207},\""user_pic\"":\""\""}}]"" }, ""amsreferences"": null}"; foreach (Match m in Regex.Matches(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