Development
Email normalizer
Normalize email addresses line by line using provider-aware rules.
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Using this tool
Normalize email spelling using provider rules for comparison, not ownership verification.
Actions: Process
Example
Enable lowercasing, known-provider subaddress removal, and Gmail dot removal; +tag remains on the custom domain.
Example action and settings
Action: Process Lowercase local parts: On Remove known-provider subaddresses: On Remove dots from Gmail usernames: On
Input / action
Foo.Bar+news@googlemail.com User+tag@example.com
Result / expected behavior
foobar@gmail.com user+tag@example.com
Available options: Lowercase local parts · Remove known-provider subaddresses · Remove dots from Gmail usernames
Scope and limitations
- Does not verify deliverability; normalization can merge inputs and custom mail domains may have different rules.
Common mistakes
- Use one address per line without display names; do not infer account ownership from normalized output.
Related tools
Privacy and browser support
Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.