Regex Tester

Test regular expressions in real-time

Test and debug regular expressions online. Real-time matching with highlighted results, match groups, and a quick-reference cheat sheet. All processing happens in your browser.

Pattern

//g

g globali case-insensitivem multilines dotAll

Test String

Matches (4)

Contact us at support@example.com or sales@company.org.
Invalid emails: user@, @domain.com, plain-text
Valid: dev.team+tag@startup.io, hello@sub.domain.co.uk

Match Details

#MatchIndexGroups

1support@example.com14-

2sales@company.org37-

3dev.team+tag@startup.io110-

4hello@sub.domain.co.uk135-

Common Patterns

Cheat Sheet

. Any character

\d Digit [0-9]

\w Word char [a-zA-Z0-9_]

\s Whitespace

^ Start of string

$ End of string

* 0 or more

+ 1 or more

? 0 or 1

{n} Exactly n

{n,m} Between n and m

[abc] Character set

[^abc] Negated set

(abc) Capture group

a|b Alternation

(?:abc) Non-capturing group

(?=abc) Lookahead

(?<name>abc) Named group