RegEx Tester

Test regular expressions in real time with capture group highlighting

JavaScript engine

Uses JavaScript regex (V8). Behavior may differ from PCRE / RE2 / POSIX engines used on servers — verify on your target engine before deploying patterns to production.

Pattern

Flags

g

Global — find all matches

i

Case insensitive

m

Multiline — ^ $ match line boundaries

s

Dotall — . matches newlines

Test string

2 matches

hello@example.com and world@test.org

#	Match	Group 1	Group 2
1	`hello@example.com`	`hello`	`example.com`
2	`world@test.org`	`world`	`test.org`

Verify outputs before using in production. No warranty — see Terms.