Email Normalizer
TextNormalize emails by lowercasing, removing Gmail dots and plus-aliases with RFC validation for deduping mailing lists and cleaning user records.
John.Doe+newsletter@gmail.com→johndoe@gmail.comgmailALICE@HOTMAIL.COM→alice@hotmail.com1 changedbob+spam@GMAIL.COM→bob@gmail.comgmailtest@outlook.com→test@outlook.comunchangeduser@subdomain.YAHOO.CO.UK→user@subdomain.yahoo.co.uk1 changedAbout Email Normalizer
john.doe+news@gmail.com, JohnDoe@Gmail.com, and johndoe@googlemail.com may all be the same inbox. This tool normalizes emails locally in your browser: it lowercases them, strips plus-tags, and for Gmail removes dots and folds googlemail.com into gmail.com, revealing the truly unique deduplicated addresses. It supports batch paste and shows total, unique, and changed counts. No emails are uploaded, making it ideal for cleaning user lists. Tip: Bookmark this tool for quick access whenever you need text processing. All processing happens locally in your browser — no data upload, so feel free to paste private content.
How to Use
- Open the Email Normalizer tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
Use Cases
- Dedupe lists — Fold case and plus-tag variants in a marketing list to count truly unique recipients.
- Abuse detection — Spot multiple alias accounts registered with plus-tags or Gmail dots on one inbox.
- Data cleaning — Unify email format before CRM import to avoid duplicate customer records.
- Login matching — Normalize the entered email before a database lookup to improve account matching.
- Batch review — Paste many emails at once to see which were rewritten and which are duplicates.
- Import validation — Normalize email columns before bulk CSV import to catch duplicates early.
- Analytics grouping — Fold plus-tag and dot variants to get a unique count of real users per campaign.
FAQ
Why are Gmail dots removed?
Gmail ignores dots in the local part when routing, so j.smith@gmail.com and jsmith@gmail.com reach the same inbox; normalization drops the dots.
What is a plus-tag and does removing it affect delivery?
A plus tag like +news is used to categorize sources; mail still reaches the base address, and removing it only helps identify the same inbox.
Does dot removal apply to non-Gmail addresses?
No. The dot rule is specific to Gmail/googlemail; other providers keep dots in the local part, so the tool applies it only to Gmail.
Can I send mail to the normalized address?
Normalized results are safest for dedup and matching; for actual sending, prefer the original address the user provided to fit each provider.
How do I hide part of an email instead?
This tool unifies format, not masking. To obscure part of an email, use our String Obfuscator.
Any browser compatibility requirements?
This tool works in all modern browsers (Chrome, Firefox, Edge, Safari). No plugins or extensions required.
Can I use it offline?
After initial load, most features work offline. The core logic runs entirely in your browser with no network dependency.
Comments
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