Regex Tester
Live matching + AI explanations in plain English. Included in the Free plan.
Want to understand regex?Lesson
Learn character classes, quantifiers, groups, and when regex is overkill vs. the right tool.
/
/g
3 matches
Free plan
to generate and explain regex with AI. Included in the Free plan.
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each line is tested independently
3 found
1
user@example.com
2
hello@test.org
3
not-an-email
4
contact@company.co.uk
Match list
#1user@example.com#2hello@test.org#4contact@company.co.uk
Quick reference
.Any character\dDigit [0-9]\wWord char [a-zA-Z0-9_]\sWhitespace^Start of string$End of string*0 or more+1 or more?0 or 1 (optional){n,m}Between n and m[abc]Character class[^abc]Negated class(abc)Capture group(?:abc)Non-capture groupa|bAlternation (a or b)\bWord boundary