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Email Normalizer

Normalize email addresses in bulk. Lowercase, trim, remove Gmail dots, strip plus aliases, and deduplicate lists.

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How to use Email Normalizer

  1. Paste a list of email addresses (one per line or comma-separated).
  2. Choose normalization options (lowercase, remove dots, strip aliases).
  3. Copy the cleaned, deduplicated list.

What is Email Normalizer?

Email normalization standardizes email addresses to their canonical form. This catches duplicates that differ only in formatting — for example, Gmail ignores dots in the local part (j.doe@gmail.com = johndoe@gmail.com) and everything after a + sign is an alias.

This tool processes a list of emails and applies configurable normalization rules. Use it to clean mailing lists, deduplicate user registrations, and prevent duplicate signups.

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FAQ

Does Gmail ignore dots?
Yes. Gmail treats j.doe, johndoe, and john.doe as the same address. This tool can remove dots for Gmail addresses to catch these duplicates.
What are plus aliases?
Gmail (and others) support user+tag@domain.com — everything after + is ignored. This lets users create disposable aliases. This tool strips the +tag part.
Is this GDPR compliant?
The tool runs entirely in your browser — no data is uploaded. You're responsible for handling email data according to your local regulations.

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