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Regex Cheat Sheet
Regex Interactive Cheat Sheet
High-performance regular expression reference guide for elite developers
PRO REFERENCE
Character Classes
. Any character (except \n)
\d Any digit (0-9)
\w Word char (a-z, 0-9, _)
\s Whitespace char
[a-z] Range (a to z)
Quantifiers
* 0 or more times
+ 1 or more times
? 0 or 1 (Optional)
{n} Exactly n times
{n,m} Between n and m
Anchors & Logic
^ Start of line
$ End of line
\b Word boundary
| OR (Alternation)
(?:...) Non-capturing group
Lookarounds
(?=...) Positive Lookahead
(?!...) Negative Lookahead
(?<=...) Positive Lookbehind
(? Negative Lookbehind
Pro Tip: Click to Copy
Click any regex token in the list above to instantly copy it to your clipboard for use in our advanced tester.