regex101: URL validation regexp

^start of line

Non-Capturing Group(?:(http?|s?ftp):\/\/|file:\/\/\/)?

?repeats the group contents below at most once:

1st Alternative(http?|s?ftp):\/\/

Group 1(http?|s?ftp)

1st Alternativehttp?

httthe literal text htt (case insensitive)

p?optionally matches the literal p (112₁₀ / 160₈ / 70₁₆) (case insensitive)

2nd Alternatives?ftp

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

ftpthe literal text ftp (case insensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativefile:\/\/\/

file:the literal text file: (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(([\P{Cc}]+):([\P{Cc}]+)@)?

?repeats the group contents below at most once:

Group 3([\P{Cc}]+)

Character Class[\P{Cc}]+

+matches at least one character from the set below:

\P{Cc}characters not matched by \p{Cc}

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 4([\P{Cc}]+)

Character Class[\P{Cc}]+

+matches at least one character from the set below:

\P{Cc}characters not matched by \p{Cc}

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 5([a-zA-Z0-9][a-zA-Z0-9.-]*)

Character Class[a-zA-Z0-9]

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

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

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

Character Class[a-zA-Z0-9.-]*

*matches any number of characters from the set below:

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

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

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 6(:[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 7($|\/[\w\-\._~:\/?[\]@!\$&'\*\+,;=.]+(\#[\w]*)?$)

1st Alternative$

$end of line

2nd Alternative\/[\w\-\._~:\/?[\]@!\$&'\*\+,;=.]+(\#[\w]*)?$

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 8(\#[\w]*)?

?repeats the group contents below at most once:

\#the literal # (35₁₀ / 43₈ / 23₁₆)

Character Class[\w]*

*matches any number of characters from the set below:

\wany word character

$end of line

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

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?|s?ftp):\/\/|file:\/\/\/)?(([\P{Cc}]+):([\P{Cc}]+)@)?([a-zA-Z0-9][a-zA-Z0-9.-]*)(:[0-9]{1,5})?($|\/[\w\-\._~:\/?[\]@!\$&'\(\)\*\+,;=.]+(\#[\w]*)?$)

Test String
New

sftp://monitoring.fre31/nagios/cgi-bin/status.cgi?hostgroup=fezgz&style=detail
file:///opt/myfile.tar.gz
https://test:ho@mydomain/video.mp4
https://test:ho@mydomain.frho.fr/fhi/subdir/download#jfpze

Regular Expressions 101

Regular Expression

Test String
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Regular Expression

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