Email Validator
Validate email addresses with RFC 5322 compliance and disposable email detection
Email Input
Enter email addresses (one per line, or separated by commas/semicolons)
Examples
Click an example to load and validate
Common valid email formats
user@example.com john.doe@company.co.uk admin@mail.server.com
Plus signs, dots, and underscores
user+tag@example.com first-last@domain.com user_name@sub.domain.org
Numbers in local part
12345@example.com user123@domain.net support@42.com
Email Validation Rules
RFC 5322 Compliance:
- Valid characters in local part: letters, numbers, and special chars
- Domain must contain at least one dot
- Top-level domain must be at least 2 characters
- Quoted strings allowed in local part
- Comments and IP addresses in domain supported
About this tool
Validate email addresses with RFC 5322 syntax checking, disposable/temporary email detection, and domain verification. Client-side only. Email Validator runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Email Validator is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Email Validator?
Open Email Validator, enter or paste your input, and copy the result. The page works without an account.
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