Regex Tester is a tool to learn, build, & test Regular Expressions (RegEx / RegExp). Results update in real-time as you type. Roll over a match or expression for details. Save & share expressions with others. Explore the Library for help & examples. Undo & Redo with {{getCtrlKey()}}-Z / Y. Search for & rate Community patterns.

Character classes Anchors Escaped characters Groups & Lookaround Quantifiers & Alternation
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any character except newline
w d s word, digit, whitespace
W D S not word, digit, whitespace
any of a, b, or c
<^abc> not a, b, or c
character between a & g
^abc$ start / end of the string
 word boundary
. * \ escaped special characters
tab, linefeed, carriage return
u00A9 unicode escaped ©
(abc) capture group
1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd

extended (x) extra (X) single line (s) unicode (u) Ungreedy (U) Anchored (A) dup subpattern names(J)
PostWhen asking a question, provide as much detail as possible. Posts of simply “It doesn”t work” may be removed. Don”t SpamBe respectful”>Posting Guidelines` – Surround code with backticks* – Surround text with stars to italicize.>> – A line starting with two greater than characters will be indented as a quote.A blank line will separate paragraphs.”>Formatting
Url checker with or without http:// or https://Match string not containing stringCheck if a string only contains numbersOnly letters and numbersMatch elements of a urlMatch an email addressdate format (yyyy-mm-dd)Url Validation Regex | Regular Expression – TahaValidate an ip addressmatch whole wordMatch or Validate phone numbernginx testspecial characters checkMatch html tagExtract String Between Two STRINGSMatch anything enclosed by square brackets.Find Substring within a string that begins and ends with paranthesisBlocking site with unblocked gamesSimple date dd/mm/yyyyEmpty String

Character classes Anchors Escaped characters Groups & Lookaround Quantifiers & Alternation
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any character except newline
w d s word, digit, whitespace
W D S not word, digit, whitespace
any of a, b, or c
<^abc> not a, b, or c
character between a & g
^abc$ start / end of the string
 word boundary
. * \ escaped special characters
tab, linefeed, carriage return
u00A9 unicode escaped ©
(abc) capture group
1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd

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