regex101: Email Validation Pattern

Pro

^start of line

Group 1(([^<>()[\]\\.,;:\s@\"]]+(\.[^<>()[\]\\.,;:\s@\"]]+)*)|(\".+\"))

1st Alternative([^<>()[\]\\.,;:\s@\"]]+(\.[^<>()[\]\\.,;:\s@\"]]+)*)

Group 2([^<>()[\]\\.,;:\s@\"]]+(\.[^<>()[\]\\.,;:\s@\"]]+)*)

Negated Character Class[^<>()[\]\\.,;:\s@\"]]+

+matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Set[\]\\.,;:\s@\"]

contains the characters below:

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sany whitespace character

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 3(\.[^<>()[\]\\.,;:\s@\"]]+)*

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^<>()[\]\\.,;:\s@\"]]+

+matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Set[\]\\.,;:\s@\"]

contains the characters below:

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sany whitespace character

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative(\".+\")

Group 4(\".+\")

\"the literal " (34₁₀ / 42₈ / 22₁₆)

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

\"the literal " (34₁₀ / 42₈ / 22₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 5((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))

1st Alternative(\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])

Group 6(\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,})

Group 7(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,})

Group 8([a-zA-Z\-0-9]+\.)+

+repeats the group contents below at least once:

Character Class[a-zA-Z\-0-9]+

+matches at least one character 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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

{2,}matches at least 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)

$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

27 tokens

Regular Expression

^(([^<>()[\]\\.,;:\s@\"]]+(\.[^<>()[\]\\.,;:\s@\"]]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$

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