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Regex Cheatsheet

Searchable cheatsheet for every common regex token — anchors, classes, quantifiers, groups, lookarounds, flags — with live examples.

How to use Regex Cheatsheet

1Paste your input in the panel above or use the example data if available.
2Choose an action — format, generate, convert, encode, or analyze.
3Your result appears instantly. Use Copy to grab it, or Download if a file option is shown.

Runs entirely in your browser

Nothing you type, paste, generate, or upload leaves your device.

Related tools

Regex Tester

Test regular expressions.

Anchors

Token	Description	Example
^	Start of string
$	End of string
\b	Word boundary
\B	Non-word boundary

Character classes

Token	Description	Example
.	Any char (except newline)
\d	Digit
\D	Non-digit
\w	Word char
\W	Non-word char
\s	Whitespace
\S	Non-whitespace
[abc]	Any of a/b/c
[^abc]	None of a/b/c
[a-z]	Range

Quantifiers

Token	Description	Example
*	0 or more
+	1 or more
?	0 or 1
{n}	Exactly n
{n,}	n or more
{n,m}	Between n and m

Groups & References

Token	Description	Example
(abc)	Capture group
(?:abc)	Non-capturing group
\|	Alternation
\1	Backreference

Lookaround

Token	Description	Example
(?=abc)	Positive lookahead
(?!abc)	Negative lookahead
(?<=abc)	Positive lookbehind
(?<!abc)	Negative lookbehind

Flags

Token	Description	Example
g	Global match
i	Case-insensitive
m	Multiline (^ and $)
s	Dot matches newline
u	Unicode