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Regex Tester
Test regular expressions online with live matching, capture groups, and flags support.
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Regex Tester Online
Test and debug your regular expressions in real-time. This tool highlights matches, shows capture groups, and supports all JavaScript regex flags (g, i, m, s, u, y).
Common Regex Patterns
- Email: match word characters + @ + domain
- IP addresses: match 4 groups of 1-3 digits separated by dots
- URLs: match http/https followed by non-whitespace characters
- Dates: match YYYY-MM-DD format
- Strong password: at least 8 chars with uppercase and digit