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

/
/
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"ACPOWER"":""([\d\.]+)"; string input = @"{""UPTIME"":""00d 00:45:26"",""RSSI"":96,""VERSION"":""1.10 04.05.2023 06:16"",""DEVICENAME"":""T2SG8BBF6C"",""STATICIP"":""192.168.88.68"",""STATICGW"":""192.168.88.1"",""STATICSN"":""255.255.255.0"",""VGRID"":236.8,""VBAT"":25.6,""SETACPOWER"":700,""TEMP"":42,""DAC"":23637,""CALSTEP"":0,""MAXPOWER"":""700"",""POWERLIMIT"":700,""VBATCUTOFF"":24,""VBATREBOOT"":24.5,""SUN2IP"":"",""SUN3IP"":"",""SUN2ROUNDTRIP"":""0"",""SUN2SETPOINT"":0,""SUN2POWERLIMIT"":0,""SUN3ROUNDTRIP"":""0"",""SUN3SETPOINT"":0,""SUN3POWERLIMIT"":0,""METERURL"":""http://192.168.88.57/status"",""METER_USER"":""admin"",""METER_PASS"":"",""JSONKEYS"":""total_power"",""METERINTERVAL"":""500"",""METERREADOUT"":142,""ZEPCTARGET"":""15"",""ZEPCAVERAGE"":""20"",""MQTT_SERVER"":"",""MQTT_PORT"":""1883"",""MQTT_USER"":"",""MQTT_PASS"":"",""HADISCOVERY"":0,""MQTT_ACSETPOINTOVR_NAME"":""T2SG8BBF6C/ACSETPOINTOVR"",""MQTT_ACSETPOINTOVR_VALUE"":"",""MQTT_DACOVR_NAME"":""T2SG8BBF6C/DACOVR"",""MQTT_DACOVR_VALUE"":"",""MQTT_CALSTEPOVR_NAME"":""T2SG8BBF6C/CALSTEPOVR"",""MQTT_CALSTEPOVR_VALUE"":"",""MQTT_METEROVR_NAME"":""T2SG8BBF6C/METEROVR"",""MQTT_METEROVR_VALUE"":"",""MQTT_MAXPOWEROVR_NAME"":""T2SG8BBF6C/MAXPOWEROVR"",""MQTT_MAXPOWEROVR_VALUE"":"",""MQTT_TARGETOVR_NAME"":""T2SG8BBF6C/TARGETOVR"",""MQTT_TARGETOVR_VALUE"":"",""MQTT_ACSETPOINT_NAME"":""T2SG8BBF6C/ACSETPOINT"",""MQTT_ACSETPOINT_VALUE"":7000,""MQTT_ACDISPLAY_NAME"":""T2SG8BBF6C/ACDISPLAY"",""MQTT_ACDISPLAY_VALUE"":7211,""MQTT_VGRID_NAME"":""T2SG8BBF6C/VGRID"",""MQTT_VGRID_VALUE"":2368,""MQTT_VBAT_NAME"":""T2SG8BBF6C/VBAT"",""MQTT_VBAT_VALUE"":256,""MQTT_DAC_NAME"":""T2SG8BBF6C/DAC"",""MQTT_DAC_VALUE"":23637,""MQTT_CALSTEP_NAME"":""T2SG8BBF6C/CALSTEP"",""MQTT_CALSTEP_VALUE"":0,""MQTT_TEMPERATURE_NAME"":""T2SG8BBF6C/TEMPERATURE"",""MQTT_TEMPERATURE_VALUE"":42,""MQTT_METER_NAME"":""T2SG8BBF6C/METER"",""MQTT_METER_VALUE"":""2963.35"",""MQTT"":""not set"",""ACPOWER"":""721.10 W"",""ACPOWERSUN2"":""not set"",""ACPOWERSUN3"":""not set"",""METERPOWER"":""2963.35 W"",""ZEPCPOWER"":""2083.90 W""}"; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { 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