regex101: JavaScript Match Workspace

Pro

^start of line

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

?repeats the group contents below at most once:

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

1st Alternativehttps?

httpthe literal text http (case sensitive)

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

2nd Alternativeftp

ftpthe literal text ftp (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([^:/\s.]+\.[^:/\s]|localhost)

1st Alternative[^:/\s.]+\.[^:/\s]

Negated Character Class[^:/\s.]+

+matches at least one character outside the set below:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\sany whitespace character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^:/\s]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\sany whitespace character

2nd Alternativelocalhost

localhostthe literal text localhost (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((?:\/\w+)*\/)?

?repeats the group contents below at most once:

Non-Capturing Group(?:\/\w+)*

*repeats the group contents below any number of times:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\w+any word character, repeated at least once

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 5([\w\-.]+[^#?\s]+)?

?repeats the group contents below at most 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)

Negated Character Class[^#?\s]+

+matches at least one character outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\sany whitespace character

Group 6([^#]*)?

?repeats the group contents below at most once:

Negated Character Class[^#]*

*matches any number of characters outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group 7(#[\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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$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

^((?:https?|ftp):\/\/?)?([^:/\s.]+\.[^:/\s]|localhost)(:\d+)?((?:\/\w+)*\/)?([\w\-.]+[^#?\s]+)?([^#]*)?(#[\w-]*)?$

Regular Expressions 101

Regular Expression

Unit Tests