Regular Expression Tester

Regular Expression

Enter Regular Expression

/ /

Flags

g - Global Match i - Ignore Case m - Multiline Mode s - Singleline Mode (dotAll) u - Unicode y - Sticky Match

Full Regular Expression: /\d{3}-\d{4}/g

Test Text

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Match Results

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Match Details

Index	Matched Content	Position	Grouping
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Replace function

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Replacement results

Regex Quick Reference

Character classes

. - Any character (except newline)
\d - Digit [0-9]
\D - Non-digit
\w - Word character [A-Za-z0-9_]
\W - Non-word character
\s - Whitespace character
\S - Non-whitespace character

Quantifiers

* - Zero or more times
+ - One or more times
? - 0 or 1 time
{n} - Exactly n times
{n,} - At least n times
{n,m} - Between n and m times

Position

^ - Start of line
$ - End of line
\b - Word boundary
\B - Non-word boundary

Grouping

(abc) - Capturing group
(?:abc) - Non-capturing group
a|b - Or (a or b)
[abc] - Character set
[^abc] - Negated character set

Common regex examples: