Email Address Regex Builder
The internet's worst-debated regex. This tool gives you the strict spec version and the practical version most production systems use.
/^[^\s@]+@[^\s@]+\.[^\s@]+$/
What HTML5 input type='email' uses. Allows almost any non-whitespace; catches typos; doesn't over-validate.
Toggle between strict, practical, and lenient. Outputs the regex with explanation of what each section matches and which edge cases it rejects.
When implementing email-format validation in your own code or in your CRM workflow rules.
FAQ
Can I validate emails with regex alone?+
Format-only. To know if an address actually exists you need an SMTP probe or an API check. Regex catches typos like 'no-at-sign'; nothing more.
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Articles, glossary entries, and other tools on the same topic.
Record generated. Now make sure it actually passes on real sends.
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