Regex Tester
g: global | i: ignore case | m: multiline | s: dotAll | u: Unicode | y: sticky
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Regex Symbol Reference
| Symbol | Description | Example |
|---|---|---|
| . | Matches any single character (except newline) | a.c matches abc, adc |
| * | Matches 0 or more of the preceding character | ab*c matches ac, abc, abbc |
| + | Matches 1 or more of the preceding character | ab+c matches abc, abbc |
| ? | Matches 0 or 1 of the preceding character | ab?c matches ac, abc |
| ^ | Matches the start of the string | ^abc matches strings starting with abc |
| $ | Matches the end of the string | abc$ matches strings ending with abc |
| \d | Matches any digit [0-9] | \d+ matches 123, 456 |
| \w | Matches word characters (letters, digits, underscore) | \w+ matches abc, 123, _test |
| \s | Matches whitespace characters (space, tab, etc.) | a\sb matches 'a b' |
| [abc] | Matches any one character in brackets | [abc] matches a, b, c |
| [^abc] | Matches any character except those in brackets | [^abc] matches d, e, f |
| [a-z] | Matches any character in the specified range | [a-z] matches lowercase letters |
| {n} | Matches exactly n occurrences of the preceding character | a{3} matches aaa |
| {n,} | Matches n or more occurrences of the preceding character | a{2,} matches aa, aaa |
| {n,m} | Matches between n and m occurrences of the preceding character | a{2,4} matches aa, aaa, aaaa |
| | | OR operator, matches either left or right expression | cat|dog matches cat or dog |
| () | Grouping, used to capture matched substrings | (ab)+ matches ab, abab |
| \ | Escape character, used to match special characters literally | \. matches a literal dot |