Free tool
Email Syntax Checker
Is this address even shaped like an address? RFC-style parsing, normalization, length limits — in your browser, nothing leaves this page.
Paste an address
Type or paste any email into the box below.
Hit check
The regex runs locally — nothing leaves this page.
Read the verdict
Valid or invalid, with the normalized form.
The typo stage, drawn
A valid-looking domain can still be a typo. The full API ships a didYouMean field when the fix list matches — flagged, never silently rewritten.
Related free tools
Each tool checks exactly one thing. To run the full pipeline — MX lookup, live SMTP probe and catch-all detection with a reason and a score — use the API.