Regular Expressions 101

1st Alternative$(?:[^)(]*(?R)?)*+$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:[^)(]*(?R)?)*+

*+repeats the group contents below any number of times:

Negated Character Class[^)(]*

*matches any number of characters outside the set below:

)the literal ) (41₁₀ / 51₈ / 29₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

(?R)?optionally recurses into the entire pattern

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\{(?:[^}{]*+(?R)?)*\}

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Non-Capturing Group(?:[^}{]*+(?R)?)*

*repeats the group contents below any number of times:

Negated Character Class[^}{]*+

*+matches any number of characters outside the set below:

}the literal } (125₁₀ / 175₈ / 7D₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

(?R)?optionally recurses into the entire pattern

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

3rd Alternative\[(?:[^][]*+(?R)?)*\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:[^][]*+(?R)?)*

*repeats the group contents below any number of times:

Negated Character Class[^][]*+

*+matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

(?R)?optionally recurses into the entire pattern

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

\((?:[^)(]*(?R)?)*+\)|\{(?:[^}{]*+(?R)?)*\}|\[(?:[^][]*+(?R)?)*\]

New

Hello [123] {45} world (67) Hello There (8) [9] {0}
(deep(nested[in{f(u)[n](n)y}]){[brackets]}) - [this] (will) not (break)