Regular Expressions 101

^start of line

\w+any word character, repeated at least once

Non-Capturing Group(?:[\.-]\w+)*

*repeats the group contents below any number of times:

Character Class[\.-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\w+any word character, repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\w+any word character, repeated at least once

Non-Capturing Group(?:[\.-]\w+)*

*repeats the group contents below any number of times:

Character Class[\.-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\w+any word character, repeated at least once

Non-Capturing Group(?:\.\w{2,3})+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{2,3}any word character, repeated between 2 and 3 times

$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

^\w+(?:[\.-]\w+)*@\w+(?:[\.-]\w+)*(?:\.\w{2,3})+$

New

valid-email-address@domain.com
very-very-very-long-and-invalid-email-address/@domain.com