CodeNeat

Regex Tester for Email Validation

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Email validation is tricky. Test against edge cases like subdomains, plus addressing, and international domains.

Example

Pattern: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$\n\nTest: alice@example.com, bob+tag@sub.domain.co.uk, invalid@
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Tips

  1. 1No regex fully validates per RFC 5322.
  2. 2Allow + addressing.
  3. 3Test international addresses.

Frequently Asked Questions

Best email regex?

Practical: ^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$

Regex or library?

Regex for format check. Library + verification email for production.

International?

Broader character ranges needed.