Your Regular Expression:
Human Speak:
Errors:
Cheat Sheet:
Full documentation available here
Matching
match "hello world"
matches "hello world" exactly
match "hello" then optionally " world"
matches "hello" or "hello world"
match "hello" or "world"
matches "hello" or "world"
match a word
matches any word
Repetition
match 0+ "hello"
matches 0 or more "hello"s
match 3 "hello"
matches exactly "hellohellohello"
match 1 to 5 "hello"
matches between 1 to 5 "hello"s
repeat 0 or more
repeats the intended text 0 or more times (default)
optionally repeat between 3 to 5
optionally repeats the indented text 3 to 5 times
Grouping
create a group called mygroup
creates a group called "mygroup"
create an optional group
creates an unnamed optional group
Using
using global and case insensitive
uses the 'g' and 'i' flags
Misc
// comment
is a single line comment
/* comment */
is a multi line comment