Regular Expressions 101

Pro

Positive Lookahead(?=\S{10,})

\S{10,}any character that is not Unicode whitespace, repeated at least 10 times

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

\S*any character that is not Unicode whitespace, repeated any number of times

Character Class[A-Z]

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

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

\S*any character that is not Unicode whitespace, repeated any number of times

Character Class[a-z]

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

Positive Lookahead(?=\S*[0-9])

\S*any character that is not Unicode whitespace, repeated any number of times

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Positive Lookahead(?=\S*[!£$%^&\"])

\S*any character that is not Unicode whitespace, repeated any number of times

Character Class[!£$%^&\"]

!the literal ! (33₁₀ / 41₈ / 21₁₆)

£the literal £ (163₁₀ / 243₈ / A3₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

\S{10,20}any character that is not Unicode whitespace, repeated between 10 and 20 times

Positive Lookahead(?=\s|\Z)

1st Alternative\s

\sa Unicode whitespace character

2nd Alternative\Z

\Zend of string

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

(?=\S{10,})(?=\S*[A-Z])(?=\S*[a-z])(?=\S*[0-9])(?=\S*[!£$%^&\"])(?<!\S)\S{10,20}(?=\s|\Z)

New

Password!123
Password!123 test test
test "Password!123" test test

 9: Abc!56789
10: -Ab!567890
20: -Ab!567890DeF4567890
21: AbC!567890DeF45678901

Password!123
Password!123 test test
test "Password!123" test test

 9: Abc!56789
10: -Ab!567890
20: -Ab!567890DeF4567890
21: AbC!567890DeF45678901