Regex Tester

Test and debug regular expressions live. Highlights all matches, shows capture groups, and supports every standard flag.

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Matches

About Regex Tester

Supported Flags

g — Global (always on — all matches shown)
i — Case insensitive
m — Multiline: ^/$ match line ends
s — Dot-all: . matches newlines

Regex Quick Reference

. — Any character (except newline)
\d \w \s — Digit, word char, whitespace
* + ? — 0+, 1+, 0 or 1 times
(abc) — Capture group
(?<name>abc) — Named capture group
(?:abc) — Non-capturing group
^ $ — Start / end of string
[a-z] [^a-z] — Character class / negation

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