Regular Expressions 101

Explanation
Pro

^start of string

Positive Lookahead(?=.*\d)

.*any character (except for line terminators), repeated any number of times

\da digit

Positive Lookahead(?=.*[a-z])

.*any character (except for line terminators), repeated any number of times

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Positive Lookahead(?=.*[A-Z])

.*any character (except for line terminators), repeated any number of times

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=.*[#$%/()=¿?*+-])

.*any character (except for line terminators), repeated any number of times

Character Class[#$%/()=¿?*+-]

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

¿the literal ¿ (191₁₀ / 277₈ / BF₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Positive Lookahead(?=(?:([\w\d])\1?(?!\1\1)))

Non-Capturing Group(?:([\w\d])\1?(?!\1\1))

Group 1([\w\d])

Character Class[\w\d]

\wany word character

\da digit

\1?optionally matches the text saved by group 1

Negative Lookahead(?!\1\1)

\1the text saved by group 1

Negative Lookahead(?!(?=.*(palabra1|palabra2|palabraN)))

Positive Lookahead(?=.*(palabra1|palabra2|palabraN))

.*any character (except for line terminators), repeated any number of times

Group 2(palabra1|palabra2|palabraN)

1st Alternativepalabra1

palabra1the literal text palabra1 (case sensitive)

2nd Alternativepalabra2

palabra2the literal text palabra2 (case sensitive)

3rd AlternativepalabraN

palabraNthe literal text palabraN (case sensitive)

.{8,20}any character (except for line terminators), repeated between 8 and 20 times

$end of string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

26 tokens

Regular Expression

^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[#$%/()=¿?*+-])(?=(?:([\w\d])\1?(?!\1\1)))(?!(?=.*(palabra1|palabra2|palabraN))).{8,20}$

mmholAhsbC123*

Substitution

VALID PASSWORD

mmholAhsbC123*