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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

Substitution

Processing...

Code Generator

Language

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)<img src=([a-zA-Z0-9_\-\s\.\"=\/:%,()]*class=\"[a-zA-Z0-9_\-\s\.\"=\/:%,()]*lazy[a-zA-Z0-9_\-\s\.\"=\/:%,()]*)" Local $sString = " <img src="fonts/608be7747d9cf15397b0d112_Logo-v3-01.svg" alt class="nav-logo">" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ " <img src="images/6085e0acf284d920e7133043_Frame%201%20%283%29.png" loading="lazy" width="500" style="opacity:0" srcset="images/6085e0acf284d920e7133043_Frame%201%20%283%29-p-500.png 500w, images/6085e0acf284d920e7133043_Frame%201%20%283%29.png 738w" sizes="(max-width: 479px) 73vw, (max-width: 767px) 77vw, (max-width: 991px) 273.991455078125px, 380px" alt class="image_header">" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ " <img src="images/6089c5d4b424624dc0cb450b_Frame%206.png" loading="lazy" width="263" sizes="(max-width: 479px) 65vw, (max-width: 767px) 77vw, (max-width: 991px) 33vw, 37vw" srcset="images/6089c5d4b424624dc0cb450b_Frame%206-p-500.png 500w, images/6089c5d4b424624dc0cb450b_Frame%206.png 651w" alt class="image_performance lazy">" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ " <img src="images/6089c5d52359073cf4b6cc80_Frame%205.png" loading="lazy" width="287" sizes="(max-width: 479px) 77vw, (max-width: 767px) 85vw, (max-width: 991px) 41vw, 43vw" srcset="images/6089c5d52359073cf4b6cc80_Frame%205-p-500.png 500w, images/6089c5d52359073cf4b6cc80_Frame%205.png 771w" alt class="image_security lazy">" & @CRLF & _ "" & @CRLF & _ " <img src="images/6089c5d4e99fbfce103ab502_Frame%207.png" loading="lazy" width="292" sizes="(max-width: 479px) 71vw, (max-width: 767px) 81vw, (max-width: 991px) 263.991455078125px, 370px" srcset="images/6089c5d4e99fbfce103ab502_Frame%207-p-500.png 500w, images/6089c5d4e99fbfce103ab502_Frame%207.png 651w" alt class="image_reliability lazy">" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ " <img src="fonts/608be7747d9cf15397b0d112_Logo-v3-01.svg" alt class="footer-logo-copy lazy">" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ " <img src="fonts/60857020dc3fb163eb8a7d19_icons8-instagram.svg" loading="lazy" alt class="instagram_logo lazy">" Local $sSubst = "<img data-src=$1" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm