Regular Expressions 101

^start of line

Positive Lookahead(?=.{8,15}$)

.{8,15}any character (except for line terminators), repeated between 8 and 15 times

$end of line

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(?=.*[^a-zA-Z])

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

Negated Character Class[^a-zA-Z]

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

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

Negative Lookahead(?!.*(.)\1{2})

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

Group 1(.)

.any character (except for line terminators)

\1{2}the text saved by group 1, repeated exactly 2 times

.+any character (except for line terminators), repeated at least once

$end of line

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?=.{8,15}$)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z])(?!.*(.)\1{2}).+$

New

jhjhjhjhjhjHk9
acceptedH5FGAGRg
jhjhjhjhjhjHk9
aA$aalkfsff
adfeAfdfddfdfd$
adfddSS4
fggfeA$fmkijhjjkhjhjk
fdfd$fF
fdfd$fFe
fdff$fFe
ffff$fFe