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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 = @"addr=\""(([0-9]{1,3}[\\.]){3}[0-9]{1,3})\"""; string input = @"<?xml version=""1.0"" encoding=""UTF-8""?> <!DOCTYPE nmaprun> <?xml-stylesheet href=""file:///usr/bin/../share/nmap/nmap.xsl"" type=""text/xsl""?> <!-- Nmap 7.80 scan initiated Fri Oct 16 04:52:18 2020 as: nmap -O -oX xml_data.xml 45.33.49.119 --> <nmaprun scanner=""nmap"" args=""nmap -O -oX xml_data.xml 45.33.49.119"" start=""1602823938"" startstr=""Fri Oct 16 04:52:18 2020"" version=""7.80"" xmloutputversion=""1.04""> <scaninfo type=""syn"" protocol=""tcp"" numservices=""1000"" services=""1,3-4,6-7,9,13,17,19-26,30,32-33,37,42-43,49,53,70,79-85,88-90,99-100,106,109-111,113,119,125,135,139,143-144,146,161,163,179,199,211-212,22> <verbose level=""0""/> <debugging level=""0""/> <host starttime=""1602823938"" endtime=""1602823972""><status state=""up"" reason=""reset"" reason_ttl=""64""/> <address addr=""45.33.49.119"" addrtype=""ipv4""/> <hostnames> <hostname name=""ack.nmap.org"" type=""PTR""/> </hostnames> <ports><extraports state=""filtered"" count=""993""> <extrareasons reason=""no-responses"" count=""993""/> </extraports> <port protocol=""tcp"" portid=""22""><state state=""open"" reason=""syn-ack"" reason_ttl=""51""/><service name=""ssh"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""25""><state state=""open"" reason=""syn-ack"" reason_ttl=""51""/><service name=""smtp"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""70""><state state=""closed"" reason=""reset"" reason_ttl=""51""/><service name=""gopher"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""80""><state state=""open"" reason=""syn-ack"" reason_ttl=""50""/><service name=""http"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""113""><state state=""closed"" reason=""reset"" reason_ttl=""51""/><service name=""ident"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""443""><state state=""open"" reason=""syn-ack"" reason_ttl=""50""/><service name=""https"" method=""table"" conf=""3""/></port> <port protocol=""tcp"" portid=""31337""><state state=""closed"" reason=""reset"" reason_ttl=""51""/><service name=""Elite"" method=""table"" conf=""3""/></port> </ports> <os><portused state=""open"" proto=""tcp"" portid=""22""/> <portused state=""closed"" proto=""tcp"" portid=""70""/> <osmatch name=""HP P2000 G3 NAS device"" accuracy=""91"" line=""34647""> <osclass type=""storage-misc"" vendor=""HP"" osfamily=""embedded"" accuracy=""91""><cpe>cpe:/h:hp:p2000_g3</cpe></osclass> </osmatch> <osmatch name=""Linux 2.6.32"" accuracy=""90"" line=""55409""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""2.6.X"" accuracy=""90""><cpe>cpe:/o:linux:linux_kernel:2.6.32</cpe></osclass> </osmatch> <osmatch name=""Linux 2.6.32 - 3.1"" accuracy=""90"" line=""56315""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""2.6.X"" accuracy=""90""><cpe>cpe:/o:linux:linux_kernel:2.6</cpe></osclass> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""3.X"" accuracy=""90""><cpe>cpe:/o:linux:linux_kernel:3</cpe></osclass> </osmatch> <osmatch name=""Ubiquiti AirMax NanoStation WAP (Linux 2.6.32)"" accuracy=""90"" line=""61488""> <osclass type=""WAP"" vendor=""Linux"" osfamily=""Linux"" osgen=""2.6.X"" accuracy=""90""><cpe>cpe:/o:linux:linux_kernel:2.6.32</cpe></osclass> <osclass type=""WAP"" vendor=""Ubiquiti"" osfamily=""embedded"" accuracy=""90""><cpe>cpe:/h:ubnt:airmax_nanostation</cpe></osclass> </osmatch> <osmatch name=""Linux 3.7"" accuracy=""90"" line=""65676""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""3.X"" accuracy=""90""><cpe>cpe:/o:linux:linux_kernel:3.7</cpe></osclass> </osmatch> <osmatch name=""Linux 2.6.32 - 3.13"" accuracy=""89"" line=""56411""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""2.6.X"" accuracy=""89""><cpe>cpe:/o:linux:linux_kernel:2.6</cpe></osclass> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""3.X"" accuracy=""89""><cpe>cpe:/o:linux:linux_kernel:3</cpe></osclass> </osmatch> <osmatch name=""Linux 3.0 - 3.2"" accuracy=""89"" line=""62456""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""3.X"" accuracy=""89""><cpe>cpe:/o:linux:linux_kernel:3</cpe></osclass> </osmatch> <osmatch name=""Linux 3.3"" accuracy=""89"" line=""65197""> <osclass type=""general purpose"" vendor=""Linux"" osfamily=""Linux"" osgen=""3.X"" accuracy=""89""><cpe>cpe:/o:linux:linux_kernel:3.3</cpe></osclass> </osmatch> <osmatch name=""Infomir MAG-250 set-top box"" accuracy=""89"" line=""59437""> <osclass type=""media device"" vendor=""Linux"" osfamily=""Linux"" osgen=""2.6.X"" accuracy=""89""><cpe>cpe:/o:linux:linux_kernel:2.6</cpe></osclass> <osclass type=""media device"" vendor=""Infomir"" osfamily=""embedded"" accuracy=""89""><cpe>cpe:/h:infomir:mag-250</cpe></osclass> </osmatch> <osmatch name=""Ubiquiti Pico Station WAP (AirOS 5.2.6)"" accuracy=""88"" line=""102825""> <osclass type=""WAP"" vendor=""Ubiquiti"" osfamily=""AirOS"" osgen=""5.X"" accuracy=""88""><cpe>cpe:/o:ubnt:airos:5.2.6</cpe></osclass> </osmatch> </os> <uptime seconds=""751775"" lastboot=""Wed Oct 7 12:03:18 2020""/> <tcpsequence index=""256"" difficulty=""Good luck!"" values=""5833A5A,D5206F79,8E66294D,8E3B0632,AC2DB44A,7F486476""/> <ipidsequence class=""All zeros"" values=""0,0,0,0,0,0""/> <tcptssequence class=""1000HZ"" values=""2CCF1F79,2CCF1FD4,2CCF2043,2CCF209E,2CCF2102,2CCF2164""/> <times srtt=""193340"" rttvar=""78390"" to=""506900""/> </host> <runstats><finished time=""1602823973"" timestr=""Fri Oct 16 04:52:53 2020"" elapsed=""34.33"" summary=""Nmap done at Fri Oct 16 04:52:53 2020; 1 IP address (1 host up) scanned in 34.33 seconds"" exit=""success""/><> </runstats> </nmaprun>"; 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