regex101: JavaScript Match Workspace

^start of line

Group 1(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?

?repeats the group contents below at most once:

1st Alternativehttp:\/\/www\.

http:the literal text http: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternativehttps:\/\/www\.

https:the literal text https: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

3rd Alternativehttp:\/\/

http:the literal text http: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

4th Alternativehttps:\/\/

https:the literal text https: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

Group 2([\-\.]{1}[a-z0-9]+)*

*repeats the group contents below any number of times:

Character Class[\-\.]{1}

{1}matches one character from the set below:

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,5}

{2,5}matches between 2 and 5 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Group 3(:[0-9]{1,5})?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-9]{1,5}

{1,5}matches between 1 and 5 characters from the set below:

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

Group 4(\/.*)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

26 tokens

Regular Expression

^(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(:[0-9]{1,5})?(\/.*)?$

New

// valid urls
https://www.google.com
http://www.google.com
http://google.com/
https://google.com/
www.google.com
google.com
https://www.google.com.ua
http://www.google.com.ua
http://google.com.ua
https://google.com.ua/
www.google.com.ua
google.com.ua
https://mail.google.com
http://mail.google.com
mail.google.com

// invalid urls
http://google
https://google.c
google
google.
.google
.google.com
goole.c
...