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🧹 Email Normalizer

Normalize email addresses for deduplication by handling provider-specific sub-addressing.

ℹ️ About Email Normalizer

The Email Normalizer is a data cleaning utility designed to identify the "base" identity of an email address. Many popular email providers (like Gmail, Outlook, and iCloud) support sub-addressing, which allows users to create infinite variations of their email address using the plus (+) symbol or, in Gmail's case, by adding or removing dots.

For example, john.doe+news@gmail.com and johndoe@gmail.com both deliver to the same physical mailbox. This tool strips away these variations to provide a single, normalized address. This is essential for developers performing database deduplication, marketers cleaning their mailing lists, and security teams identifying multiple accounts created by the same individual.

📖 How to use Email Normalizer

  1. 1. Enter the email address you wish to normalize.
  2. 2. Click 'Run Tool' to perform the transformation.
  3. 3. Review the 'Normalized Email' to see the base version of the address.
  4. 4. Use the normalized version for your data comparison or deduplication logic.

❓ Frequently Asked Questions

How does Gmail handle dots?

Gmail ignores dots in the username. For example, <code>j.o.h.n.doe@gmail.com</code> is the same as <code>johndoe@gmail.com</code>.

What is sub-addressing?

It is a feature where any text after a plus sign (+) is ignored by the mail server for routing purposes, allowing users to tag their sign-ups (e.g., <code>user+github@example.com</code>).

Is this tool useful for security?

Yes. It helps identify 'Sybil' attacks where one person creates multiple accounts using different variations of the same email address.

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