Email Format Validator Online
Free online email validator that tests common RFC-style syntax for signup forms and API inputs.
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Free online email validator that tests common RFC-style syntax for signup forms and API inputs.
How it works
This tool checks email syntax rules like local-part@domain. It helps reduce obvious typos before sending verification emails.
Example
Input: dev@site.com Output: Valid format
FAQ
Does this confirm the email inbox exists?
No. Format validation cannot guarantee deliverability. Use verification emails or provider checks for that.
Should I use strict RFC validation?
Strict RFC rules allow unusual addresses. Many products prefer a pragmatic validator for real-world addresses.
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