Runs entirely in your browser
Regex Tester & Builder
Test and debug regular expressions in real-time with match highlighting and explanations.
//
TEST STRING129 chars
MATCHES
Contact us at hello@example.com or support@test.org for more info.
You can also reach invalid-email or another.email@domain.co.uk
Match Details (3 matches)
| # | Match | Position | Groups |
|---|---|---|---|
| 1 | hello@example.com | 14-31 | - |
| 2 | support@test.org | 35-51 | - |
| 3 | another.email@domain.co.uk | 103-129 | - |
Regex Quick Reference
Characters
. Any character
\d Digit [0-9]
\w Word [a-zA-Z0-9_]
\s Whitespace
\D \W \S Negations
Quantifiers
* 0 or more
+ 1 or more
? 0 or 1
{n} Exactly n
{n,m} n to m times
Anchors
^ Start of line
$ End of line
\b Word boundary
\B Not word boundary
Groups
(abc) Capture group
(?:abc) Non-capture
a|b OR
[abc] Character set
[^abc] Negated set
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