The Email Normalizer is a specialized utility designed to convert email addresses into their canonical (standardized) format. This tool is essential for developers and data analysts who need to deduplicate user lists, link accounts, or ensure consistent data storage.
Email providers often have unique rules for how they handle addresses. For example, Gmail ignores dots and allows "plus-tagging" (sub-addressing). Without normalization, john.doe@gmail.com and johndoe+news@gmail.com might be treated as two different users, even though they point to the same inbox.
- Deduplication: Identify duplicate accounts that use different variations of the same email.
- Data Integrity: Ensure all email addresses in your database follow a consistent format.
- Privacy-Focused: All processing happens locally in your browser; your email data is never sent to our servers.
The tool applies a set of sophisticated rules based on common email provider behaviors and RFC standards:
- Domain Lowercasing: All domain parts (after the
@) are converted to lowercase, as domains are case-insensitive. - Sub-addressing (Plus Aliases): For most providers, everything after a
+symbol in the local part is removed (e.g.,user+extra@domain.combecomesuser@domain.com). - Local Part Lowercasing: For most providers (except Gmail), the local part is converted to lowercase to ensure a canonical form.
| Provider | Domain Standardization | Specific Logic |
|---|---|---|
| Gmail / Googlemail | gmail.com |
Removes all dots (.) from the local part. Standardizes googlemail.com to gmail.com. |
| Outlook / Hotmail | Original Domain | Removes plus aliases. Supports outlook.com, hotmail.com, live.com, and msn.com. |
| Yahoo | yahoo.com |
Removes plus aliases. Standardizes ymail.com and rocketmail.com to yahoo.com. |
| iCloud | icloud.com |
Removes plus aliases. Standardizes me.com and mac.com to icloud.com. |
- Enter Email: Type or paste the email address you want to normalize into the input field.
- Instant Feedback: The tool validates the format and displays the normalized version immediately.
- Copy Result: Click the "Copy Normalized" button to copy the result to your clipboard.
You can find the tool at the following link: https://tools.lavx.hu/tools/email-normalizer
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Related Topics: email-security, data-cleaning, devops-tools, canonical-email, deduplication