regex101: URL Validation JS

Pro

^start of line

Non-Capturing Group(?:ftp|https?)

1st Alternativeftp

ftpthe literal text ftp (case sensitive)

2nd Alternativehttps?

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negative Lookahead(?!0\.0\.0\.0$)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

$end of line

Non-Capturing Group(?:(?:(?:1?\d\d?|2[0-4]\d|25[0-5])(?:\.(?!$))?){4}|(?:[a-zA-Z\d]\.|[a-zA-Z\d](?:(?![-.]{2})[a-zA-Z\d-]){0,63}?[a-zA-Z\d]\.){1,63}?[a-z]{2,63})

1st Alternative(?:(?:1?\d\d?|2[0-4]\d|25[0-5])(?:\.(?!$))?){4}

Non-Capturing Group(?:(?:1?\d\d?|2[0-4]\d|25[0-5])(?:\.(?!$))?){4}

{4}repeats the group contents below exactly 4 times:

Non-Capturing Group(?:1?\d\d?|2[0-4]\d|25[0-5])

1st Alternative1?\d\d?

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

\d?optionally matches a digit

2nd Alternative2[0-4]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

3rd Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Non-Capturing Group(?:\.(?!$))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!$)

$end of line

2nd Alternative(?:[a-zA-Z\d]\.|[a-zA-Z\d](?:(?![-.]{2})[a-zA-Z\d-]){0,63}?[a-zA-Z\d]\.){1,63}?[a-z]{2,63}

Non-Capturing Group(?:[a-zA-Z\d]\.|[a-zA-Z\d](?:(?![-.]{2})[a-zA-Z\d-]){0,63}?[a-zA-Z\d]\.){1,63}?

{1,63}?repeats the group contents below between 1 and 63 times:

1st Alternative[a-zA-Z\d]\.

Character Class[a-zA-Z\d]

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)

2nd Alternative[a-zA-Z\d](?:(?![-.]{2})[a-zA-Z\d-]){0,63}?[a-zA-Z\d]\.

Character Class[a-zA-Z\d]

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

Non-Capturing Group(?:(?![-.]{2})[a-zA-Z\d-]){0,63}?

{0,63}?repeats the group contents below between 0 and 63 times:

Negative Lookahead(?![-.]{2})

Character Class[-.]{2}

{2}matches exactly 2 characters from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zA-Z\d-]

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 - (45₁₀ / 55₈ / 2D₁₆)

Character Class[a-zA-Z\d]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,63}

Non-Capturing Group(?:[:/].*)?

$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

26 tokens

Regular Expression

^(?:ftp|https?):\/\/(?!0\.0\.0\.0$)(?:(?:(?:1?\d\d?|2[0-4]\d|25[0-5])(?:\.(?!$))?){4}|(?:[a-zA-Z\d]\.|[a-zA-Z\d](?:(?![-.]{2})[a-zA-Z\d-]){0,63}?[a-zA-Z\d]\.){1,63}?[a-z]{2,63})(?:[:/].*)?$

New

---- GOOD ----
http://10.25.41.81:6000/api/File/GetContentResult?ObjectId=62ab059f5045ea0bb69e00d9
http://10.25.41.81:6600/api/File/GetContentResult?ObjectId=62ab0d9e5045ea0bb69e00e4
http://10.25.41.81:6600/api/File/GetContentResult?ObjectId=62a89a8c4f3326cc410c40ef
http://10.25.41.33:6600/api/File/GetContentResult?ObjectId=62ab04855045ea0bb69e00d7
https://websitebuilders.com
https://www.fceboo.k.com/Learn-the-Net-330002341216/
ftp://aeneas.m.it.edu/
https://en.wkip.ed-i.org/wiki/Internet#Terminolog
http://foo.com/blah_blah
http://foo.com/blah_blah/
http://foo.com/blah_blah_(wikipedia)
http://foo.com/blah_blah_(wikipedia)_(again)
http://www.example.com/wpstyle/?p=364
https://www.example.com/foo/?bar=baz&inga=42&quux
http://a.ws/䨹
http://foo.com/blah_(wikipedia)#cite-1
http://foo.com/blah_(wikipedia)_blah#cite-1
http://foo.com/unicode_(✪)_in_parens
http://foo.com/(something)?after=parens
http://code.google.com/events/#&product=browser
http://js.mp
ftp://foo.bar/baz
http://foo.bar/?q=Test%20URL-encoded%20stuff
http://1337.net
http://a.b-c.de
http://223.255.255.254
https://example.com/././foo
https://EXAMPLE.com/../x
https://example.org//
https://example.org/foo bar
http://foo.bar/foo(bar)baz quux
https://example.com:demo
https://r.com/r/zxVH

---- BAD ----
https://user:password@example.org/
http://userid:password@example.com:8080
http://userid:password@example.com:8080/
http://userid:password@example.com
http://userid:password@example.com/
http://userid@example.com
http://userid@example.com/
http://userid@example.com:8080
http://userid@example.com:8080/
file://loc%61lhost/
http://⌘.ws
http://⌘.ws/
http://☺.damowmow.com/
http://✪df.ws/123
http://[www.example.com]/
https://ex ample.org/
file://C|/demo
\example\..\demo/.\
https:example.org
https://////example.com///
http://0.0.0.0
http://3628126748
http://www.foo.bar./
http://a.b-.co
http://-a.b.co
http://-error-.invalid/
http://~_!$&'()*+,;=:%40:80%2f::::::@example.com
http://
http://.
http://..
http://../
http://?
http://??
http://??/
http://#
http://##
http://##/
http://foo.bar?q=Spaces should be encoded
//
//a
///a
///
http:///a
foo.com
rdar://1234
h://test
http:// shouldfail.com
:// should fail
ftps://foo.bar/
http://.www.foo.bar/
http://.www.foo.bar./