Regex Cheatsheet

Référence regex complète avec motifs, classes de caractères, quantificateurs et plus. Recherchez et copiez facilement les motifs.

Search Patterns

Character Classes

.Any character except newlinea.c → abc, aXc

\dDigit (0-9)\d{3} → 123

\DNon-digit\D+ → abc

\wWord character (a-z, A-Z, 0-9, _)\w+ → hello_123

\WNon-word character\W → @, #, !

\sWhitespace (space, tab, newline)a\sb → a b

\SNon-whitespace\S+ → hello

[abc]Any of a, b, or c[aeiou] → vowels

[^abc]Not a, b, or c[^0-9] → non-digits

[a-z]Range a to z[A-Za-z] → letters

Anchors

^Start of string/line^Hello → Hello...

$End of string/lineworld$ → ...world

\bWord boundary\bcat\b → cat (not cats)

\BNon-word boundary\Bcat → bobcat

Quantifiers

*0 or morea* → '', a, aa, aaa

+1 or morea+ → a, aa, aaa

?0 or 1 (optional)colou?r → color, colour

{n}Exactly n times\d{4} → 2024

{n,}n or more times\d{2,} → 12, 123, 1234

{n,m}Between n and m times\d{2,4} → 12, 123, 1234

*?0 or more (lazy)a*? → minimal match

+?1 or more (lazy)<.+?> → <b> (not <b>...</b>)

Groups & References

(abc)Capturing group(\d+) → captures digits

(?:abc)Non-capturing group(?:ab)+ → abab

(?<name>abc)Named capturing group(?<year>\d{4})

\1Backreference to group 1(\w)\1 → aa, bb

(a|b)Alternation (a or b)(cat|dog) → cat or dog

Lookahead & Lookbehind

(?=abc)Positive lookahead\d(?=px) → 5 in '5px'

(?!abc)Negative lookahead\d(?!px) → 5 in '5em'

(?<=abc)Positive lookbehind(?<=\$)\d+ → 100 in '$100'

(?<!abc)Negative lookbehind(?<!\$)\d+ → 100 in '€100'

Flags

gGlobal (find all matches)/a/g → all 'a' matches

iCase insensitive/abc/i → ABC, abc, Abc

mMultiline (^ and $ match line breaks)/^line/m

sDotall (. matches newlines)/a.b/s → a\nb

uUnicode support/\u{1F600}/u → emoji

Common Patterns

^[\w.-]+@[\w.-]+\.\w{2,}$Email (basic)user@example.com

^https?://[\w.-]+(?:/[\w.-]*)*$URL (basic)https://example.com/path

^\d{4}-\d{2}-\d{2}$Date (YYYY-MM-DD)2024-01-15

^\+?[\d\s-]{10,}$Phone number (basic)+1 555-123-4567

^#?([0-9A-Fa-f]{3}|[0-9A-Fa-f]{6})$Hex color#FF5733, #F00

^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$IPv4 address (basic)192.168.1.1

Expressions Régulières - Détails techniques

Les expressions régulières (regex) sont des motifs pour correspondre au texte. Elles sont utilisées dans la recherche, la validation, l'analyse et la manipulation de texte dans les langages de programmation et les outils.

Alternative en ligne de commande

// Common patterns\n\\d+       Match digits\n\\w+       Match word chars\n^...$     Start/end anchors\n(a|b)     Alternation\n(?=...)   Positive lookahead