regex101: PCRE (Legacy) Match Workspace

Pro

^start of string

Positive Lookahead(?=.{12,})

.{12,}any character (except for line terminators), repeated at least 12 times

Comment: at least 12 characters

Positive Lookahead(?=(?:[^a-z]*[a-z]){3,})

Non-Capturing Group(?:[^a-z]*[a-z]){3,}

{3,}repeats the group contents below at least 3 times:

Negated Character Class[^a-z]*

*matches any number of characters outside the set below:

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

Character Class[a-z]

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

Comment: at least 3 lowercase characters

Positive Lookahead(?=(?:[^A-Z]*[A-Z]){3,})

Non-Capturing Group(?:[^A-Z]*[A-Z]){3,}

{3,}repeats the group contents below at least 3 times:

Negated Character Class[^A-Z]*

*matches any number of characters outside the set below:

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

Character Class[A-Z]

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

Comment: at least 3 uppercase characters

Positive Lookahead(?=(?:[^0-9]*[0-9]){1,})

Non-Capturing Group(?:[^0-9]*[0-9]){1,}

{1,}repeats the group contents below at least once:

Negated Character Class[^0-9]*

*matches any number of characters outside the set below:

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

Character Class[0-9]

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

Comment: a number

Positive Lookahead(?=(?:[^ -\/:-@[-`{-~]*[ -\/:-@[-`{-~]){1,})

Non-Capturing Group(?:[^ -\/:-@[-`{-~]*[ -\/:-@[-`{-~]){1,}

{1,}repeats the group contents below at least once:

Negated Character Class[^ -\/:-@[-`{-~]*

*matches any number of characters outside the set below:

-\/one character from (32₁₀) to / (47₁₀)

:-@one character from : (58₁₀) to @ (64₁₀)

[-`one character from [ (91₁₀) to ` (96₁₀)

{-~one character from { (123₁₀) to ~ (126₁₀)

Character Class[ -\/:-@[-`{-~]

-\/one character from (32₁₀) to / (47₁₀)

:-@one character from : (58₁₀) to @ (64₁₀)

[-`one character from [ (91₁₀) to ` (96₁₀)

{-~one character from { (123₁₀) to ~ (126₁₀)

Comment: a special character

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

$end of string, or before its final line terminator

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

25 tokens

Regular Expression

^
(?=.{12,})                  # at least 12 characters
(?=(?:[^a-z]*[a-z]){3,})    # at least 3 lowercase characters
(?=(?:[^A-Z]*[A-Z]){3,})    # at least 3 uppercase characters
(?=(?:[^0-9]*[0-9]){1,})    # a number
(?=(?:[^ -\/:-@[-`{-~]*[ -\/:-@[-`{-~]){1,}) # a special character
.*$

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