Regular Expressions 101

Pro

Group 1(http(s|):|)

1st Alternativehttp(s|):

httpthe literal text http (case insensitive)

Group 2(s|)

1st Alternatives

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

2nd Alternative — matches an empty string

:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative — matches an empty string

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3(www\.|)

1st Alternativewww\.

wwwthe literal text www (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative — matches an empty string

youtthe literal text yout (case insensitive)

Group 4(.*?)

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 5(embed\/|watch.*?v=|)

1st Alternativeembed\/

embedthe literal text embed (case insensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativewatch.*?v=

watchthe literal text watch (case insensitive)

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

v=the literal text v= (case insensitive)

3rd Alternative — matches an empty string

Group 6([a-z_A-Z0-9\-]{11})

Character Class[a-z_A-Z0-9\-]{11}

{11}matches exactly 11 characters from the set below:

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

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

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

26 tokens

(http(s|):|)\/\/(www\.|)yout(.*?)\/(embed\/|watch.*?v=|)([a-z_A-Z0-9\-]{11})

New

https://www.youtube.com/watch?v=ZSn3Tvc7jQU
https://youtu.be/ZSn3Tvc7jQU
https://youtu.be/ZSn3Tvc7jQU?t=280
https://www.youtube.com/embed/ZSn3Tvc7jQU