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Test String

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Pattern Explained

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Regex Cheat Sheet

Character Classes

\dAny digit (0–9)

\DAny non-digit

\wWord char (a-z, A-Z, 0-9, _)

\WNon-word character

\sWhitespace (space, tab, newline)

\SNon-whitespace

[abc]Any of a, b or c

[^abc]Not a, b or c

[a-z]Character in range a–z

.Any char except newline

Quantifiers

*0 or more (greedy)

+1 or more (greedy)

?0 or 1 (optional)

*?0 or more (lazy)

+?1 or more (lazy)

{3}Exactly 3 times

{3,}3 or more times

{3,6}Between 3 and 6 times

Anchors & Boundaries

^Start of string / line

$End of string / line

\bWord boundary

\BNon-word boundary

Groups

(abc)Capturing group

(?:abc)Non-capturing group

(?=abc)Positive lookahead

(?!abc)Negative lookahead

(?<=abc)Positive lookbehind

(?Negative lookbehind

a|ba or b (alternation)

Escape Sequences

\nNewline

\tTab character

\rCarriage return

\\Literal backslash

\.Literal dot

Common Patterns

[\w.-]+@[\w.-]+\.\w{2,}Email

https?://[^\s]+URL

#[0-9a-fA-F]{3,6}Hex color

\d{4}-\d{2}-\d{2}Date YYYY-MM-DD

[6-9]\d{9}Indian mobile number

Regex Tester & Explainer