Normalize email addresses by removing dots (Gmail), stripping +tags, and lowercasing. Process multiple emails at once for deduplication and cleaning. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
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Lowercasing the domain, removing dots from Gmail addresses (before @), stripping +tags, and trimming whitespace.
Gmail ignores dots in the local part. [email protected] and [email protected] are the same inbox. This helps deduplicate.
Yes. Paste a list of emails (one per line) and all will be normalized in batch.
Gmail-specific rules (dot removal, +tag stripping) are applied only to Gmail/Googlemail addresses. Other providers get standard normalization.
No. All normalization happens locally in your browser. No email data is transmitted or stored.
Rejected: empty input, missing @, empty local part, domain without a dot, local part over 64 chars, domain over 253 chars, leading/trailing . - _ and double-dot runs. 16 disposable domains flag as throwaway, including mailinator.com, guerrillamail.com, yopmail.com, 10minutemail.com and trashmail.com.
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