Regular Expression Tester – Test and Debug Regex Patterns

No matches found.

. — Any character except newline
\w — Word character [a-zA-Z0-9_]
\d — Digit [0-9]
\s — Whitespace
[abc] — Any character a, b, or c
[^abc] — Not a, b, or c
a* — 0 or more a's
a+ — 1 or more a's
a? — 0 or 1 a
a{3} — Exactly 3 a's
a{3,} — 3 or more a's
a{3,5} — 3 to 5 a's
(abc) — Capture group
| — OR
^ — Start of line
$ — End of line
\b — Word boundary
(?=a) — Lookahead
(?<=a) — Lookbehind

Regular Expression Tester – Test and Debug Regex Patterns