Regular Expressions 101

Negative Lookahead(?![[:alnum:]]|@|-|_|\.)

1st Alternative[[:alnum:]]

Character Class[[:alnum:]]

[:alnum:]an alphanumeric character [a-zA-Z0-9]

2nd Alternative@

@the literal @ (64₁₀ / 100₈ / 40₁₆)

3rd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

4th Alternative_

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

5th Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

.any character (except for line terminators)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?![[:alnum:]]|@|-|_|\.).

New

test109@email.com
teS%&/\()=? `t-109@em'ail.com
test_-abc0/!"§$%&/\()=? `  *ÜÄÖ'_:;,.-~1@emai.com
Test.info@email.com
test.in\fo@email-a/!"§$%&/\()=ddr.c *ÜÄÖ'_:;,.net