Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:[a-zA-Z0-9]{3}[a-zA-Z]{2}[a-zA-Z0-9]*|[a-zA-Z0-9]{3}[a-zA-Z]{1,2}|[a-zA-Z0-9]{0,3})

1st Alternative[a-zA-Z0-9]{3}[a-zA-Z]{2}[a-zA-Z0-9]*

Character Class[a-zA-Z0-9]{3}

{3}matches exactly 3 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)

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

Character Class[a-zA-Z]{2}

{2}matches exactly 2 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)

Character Class[a-zA-Z0-9]*

*matches any number of 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)

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

2nd Alternative[a-zA-Z0-9]{3}[a-zA-Z]{1,2}

Character Class[a-zA-Z0-9]{3}

{3}matches exactly 3 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)

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

Character Class[a-zA-Z]{1,2}

{1,2}matches between 1 and 2 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)

3rd Alternative[a-zA-Z0-9]{0,3}

Character Class[a-zA-Z0-9]{0,3}

{0,3}matches between 0 and 3 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)

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

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.

26 tokens

Regular Expression

^(?:[a-zA-Z0-9]{3}[a-zA-Z]{2}[a-zA-Z0-9]*|[a-zA-Z0-9]{3}[a-zA-Z]{1,2}|[a-zA-Z0-9]{0,3})

New

abcfobar
abc33bar
abca3bar
abc3abar

ab3abar
c3abar
3abar
bar

ab3a3ar
c3ab4r
3aba4
bar

234f22fsdf


a23a3ar
c3ab4r
3aba4
bar

@saff
a@
4@
ab@
abc@
abcd@f
avcde@
abcdef@
abcdefg@