Email Validator is a free online tool that checks whether email addresses are syntactically valid using RFC 5322 regex patterns. Supports bulk validation of multiple emails, one per line.
Email validation checks whether an email address conforms to the standard format defined by RFC 5322. It verifies the presence of a local part, an @ symbol, a domain, and a top-level domain. Client-side validation is used to catch obvious formatting errors before sending data to a server.
Email Validator
Validate one or multiple email addresses instantly in your browser.
How to Use
- Enter one or more email addresses in the input field, one per line
- Click the Validate button
- Each email will be shown as valid (green) or invalid (red) with a reason
- Fix any invalid emails and re-validate as needed
Example
Input
user@example.com bad-email test@test.org
Output
user@example.com ✓ Valid bad-email ✗ Missing @ symbol test@test.org ✓ Valid
FAQ
- Does this tool verify if the email actually exists?
- No, this tool only validates the format of the email address. Verifying whether an email inbox actually exists requires sending a test email or using an email verification API.
- Is this tool free?
- Yes, it is completely free with no registration required.
- Does this tool run in the browser?
- Yes, all validation happens locally in your browser with no data sent to a server.