Email Normalizer
How to use this email normalizer
- Paste a list of email addresses, one per line.
- Each one normalizes instantly below.
- Addresses that normalize to the same value are flagged as duplicates.
What does normalization do?
For Gmail and Google Workspace addresses, dots in the local part are ignored and anything after a "+" is a tag, both stripped out here — since John.Doe+shopping@gmail.com and johndoe@gmail.com deliver to the exact same inbox.
Does this apply to all email providers?
The dot-ignoring rule is specific to Gmail/Google Workspace. This tool also strips +tags for all addresses, which most major providers (Outlook, Yahoo, etc.) support the same way, though dot-handling varies by provider.
Why would I need to normalize emails?
Common uses include deduplicating a mailing list, detecting users creating multiple "fake" accounts with the same real inbox, or cleaning up signup data.