10 Most Useful Regex Patterns in 2025
Here are the patterns every developer uses — now with instant explanations built in.
1. Email Address
^([a-zA-Z0-9._%+-]+)@([a-zA-Z0-9.-]+)\.([a-zA-Z]{2,}})$
Matches 99.9% of real emails. Robust but readable.
2. URL (http/https)
^(https?:\/\/)[\w.-]+(\.[a-z]{2,}})(\/.*)?$
Simple, effective, and safe.
3. Strong Password
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}}$
Enforces uppercase, lowercase, number, and symbol.
4. Date (YYYY-MM-DD)
^\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[12]\d|3[01])$
Validates real dates (no Feb 30).
5. UUID v4
^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
Exact match for standard UUIDs.
And 5 More…
All available in the tool’s “Quick Examples” gallery. Click any to load instantly.
FAQ
Are these patterns perfect?
No regex is. These are battle-tested and practical.
Can I modify them?
Yes — and this tool shows you exactly what changes do.
Stop copying blind patterns. Understand them.