Regular Expressions 101

Pro

^start of line

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

\ban ASCII word boundary

Negative Lookahead(?!www\.)

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 1((?:[\w-]+\.)+[\w-]+)

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

+repeats the group contents below at least once:

Character Class[\w-]+

+matches at least one character from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[\w-]+

+matches at least one character from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

26 tokens

Regular Expression

^.*?\b(?!www\.)((?:[\w-]+\.)+[\w-]+).*$

New

http://nike-admin.app.com
google.com
www.google.com
ftp://ftp.google.com
http://www.google.com
http://www.google.com/
https://www.google.com/
https://www.google.com.sg/
http://app.com
http://www.app.com

Extraction

http://nike-admin.app.com
google.com
www.google.com
ftp://ftp.google.com
http://www.google.com
http://www.google.com/
https://www.google.com/
https://www.google.com.sg/
http://app.com
http://www.app.com