regex101: Website validation

^start of line

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

?repeats the group contents below at most once:

1st Alternativehttp:\/\/

http:the literal text http: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativehttps:\/\/

https:the literal text https: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(www\.)?

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zA-Z0-9-_\.]+

+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)

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zA-Z]+

+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)

Group 3(:\d+)?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d+a digit, repeated at least once

Group 4(\/[a-zA-Z\d\.\-_]*)*

*repeats the group contents below any number of times:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-zA-Z\d\.\-_]*

*matches any number of 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)

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[a-zA-Z.!@#$%&=-_'":,.?\d*)(]*

*matches any number of 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)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

=-_one character from = (61₁₀) to _ (95₁₀)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\da digit

*the literal * (42₁₀ / 52₈ / 2A₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

$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

Search reference

Regular Expression

^(http:\/\/|https:\/\/)?(www\.)?[a-zA-Z0-9-_\.]+\.[a-zA-Z]+(:\d+)?(\/[a-zA-Z\d\.\-_]*)*[a-zA-Z.!@#$%&=-_'":,.?\d*)(]*$

Test String
New

http://preview.ynot.com:80/cgibin/nd_CGI-50.cgi/YnotPhoenix/CFsMain
https://the-parrot-lands.com/ewefwe/fwefwe/jljlk%hkuj
http://twas.brillig.and.the.slithy.toves.
http://csrpathway.com
https://google.com
https://google.com:8080/
parrotlands.com/
http://www.google.com/aa
http://www.google.com
https://regex101.info
http://a.com:8080/asdfas.php?as=3729&asd=df&a=*)fw3287&asdf=223
101_regix.com/aaa/
t.me/anhnch
ig.me/aa/33/22/332833/adasd/eoe/owerw.php
ww.com/index.php?asd=339298
http://art.com/artgallery/default.asp?sid=9DF4BC0580DF11D3ACB60090271E26A8&command=freelist
http://www.drugemporium.com/cec/cstage?eccookie=@eccookie@&ecaction=de_ecwalkin&template=de_walkin.en.htm
http://www.sfgate.com/cgibin/srch_archive/dropdn_srch.cgi?template=templates2Ftypes2Ffood2Ffd_ddstemplate.shtml&item=templates%2Ftypes%2Ffood%2Ffd_ddsitem.txt&subject=RESTAURANTS%2BAND%2BREVIEW&keyword=shrimp&datesearch=366&year=

Regular Expression

Test StringNew

Test String
New