Regular Expressions 101

Explanation

Pro

\ban ASCII word boundary

Positive Lookahead(?=[A-Za-z]*\d)

Character Class[A-Za-z]*

*matches any number of characters from the set below:

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

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

\da digit

Positive Lookahead(?=(?:[a-z\d]*[A-Z]){3})

Non-Capturing Group(?:[a-z\d]*[A-Z]){3}

{3}repeats the group contents below exactly 3 times:

Character Class[a-z\d]*

*matches any number of characters from the set below:

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

\da digit

Character Class[A-Z]

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

Positive Lookahead(?=(?:[A-Z\d]*[a-z]){2})

Non-Capturing Group(?:[A-Z\d]*[a-z]){2}

{2}repeats the group contents below exactly 2 times:

Character Class[A-Z\d]*

*matches any number of characters from the set below:

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

\da digit

Character Class[a-z]

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

Character Class[a-zA-Z\d]{5,30}

{5,30}matches between 5 and 30 characters from the set below:

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

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

\da digit

\ban ASCII word boundary

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

26 tokens

Regular Expression

\b(?=[A-Za-z]*\d)(?=(?:[a-z\d]*[A-Z]){3})(?=(?:[A-Z\d]*[a-z]){2})[a-zA-Z\d]{5,30}\b

New

Detect

22Abcde3FGhiDE%22Zyx23
|AAbc2C4
P A Abcde3Dd3FGhiDE Z H
ZZ123!Abcde3FGhiDE!123

Don't detect

IAMoverTHELIMITTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT3
NULLLLLLLLLLLLLLLLLLLLLLllll
|A|b|c|D|E|F|1|
<HeLLoWoRlD"123

Substitution

Detect

22Abcde3FGhiDE%22Zyx23
|AAbc2C4
P A Abcde3Dd3FGhiDE Z H
ZZ123!Abcde3FGhiDE!123

Don't detect

IAMoverTHELIMITTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT3
NULLLLLLLLLLLLLLLLLLLLLLllll
|A|b|c|D|E|F|1|
<HeLLoWoRlD"123