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 = @"B(?<Seconds>[\d\w]{34})\s"; string input = @"Start File AXCT XCTrack 0.6.0 - translations: 2017-03-14 17:49:58 on HUAWEI GEM-702L 6.0 HPPLTPILOT:Kay Starkermann HOSITSite:Schwängimatt HPCCLCOMPETITION CLASS:FAI-3 (PG) HPGTYGLIDERTYPE:SKYWALK Spice HODTM100GPSDATUM:WGS-84 HFALG:GEO HFDTE060417 LXCTDEVICE eyJjYXBhYmlsaXRpZXMiOnsibWVtQ2xhc3MiOjI1NiwibWVtTGFyZ2VDbGFzcyI6M LXCTDEVICE jU2LCJuYW4iOnRydWV9LCJkZXZpY2UiOnsiYW5kcm9pZElkIjoiMzRhM2Q1MzBhZm LXCTDEVICE I4YmViYyIsImJvYXJkIjoiR0VNLTcwMkwiLCJidWlsZElkIjoiSFVBV0VJR0VNLTc LXCTDEVICE wMkwiLCJjcHVBQkkiOiJhcm02NC12OGEiLCJjcHVBQkkyIjoiIiwiZGV2aWNlU3Ry LXCTDEVICE aW5nIjoiSFVBV0VJIEdFTS03MDJMIDYuMCIsImRpc3BsYXkiOnsiaCI6MTg0OCwib LXCTDEVICE W0iOjE1Ljc0ODAzMiwidyI6MTIwMH0sImZpbmdlcnByaW50IjoiSFVBV0VJL0dFTS LXCTDEVICE 03MDJML0hXR2VtaW5pOjYuMC9IVUFXRUlHRU0tNzAyTC9DMjA5QjIwMzp1c2VyL3J LXCTDEVICE lbGVhc2Uta2V5cyIsImhhcmR3YXJlIjoiaGkzNjM1IiwibWFudWZhY3R1cmVyIjoi LXCTDEVICE SFVBV0VJIiwicHJvZHVjdCI6IkdFTS03MDJMIiwic2RrIjoyM30sInhjdHJhY2siO LXCTDEVICE nsidmVyc2lvbkNvZGUiOjYzLCJ2ZXJzaW9uTmFtZSI6IjAuNi4wIC0gdHJhbnNsYX LXCTDEVICE Rpb25zOiAyMDE3LTAzLTE0IDE3OjQ5OjU4In19 LXCTSENSOR Sensors: SENSOR_BT, external GPS:true, external baro:true, intern LXCTSENSOR al baro:false LXCTEARTHMODEL FAI_SPHERE B1505404717336N00740471EA0101001091 B1505414717336N00740472EA0101001091 B1505424717335N00740472EA0101001091 B1505434717336N00740472EA0101001090 B1505444717336N00740472EA0100901090 B1505454717336N00740471EA0100901091 B1505464717336N00740471EA0101001091 B1505474717336N00740471EA0101001091 B1505484717336N00740471EA0101001091 B1505494717336N00740471EA0101001091 B1505504717336N00740471EA0101001091 B1505514717336N00740471EA0101001091 End File"; 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