Email Validator — A bad email is a quiet form of lost contact — a typo at sign-up, a throwaway address that bounces a year later, or a role address that no one reads. This validator checks the structural format, surfaces common typos against real providers, flags disposable / throwaway services, and warns when an address is generic (admin@, support@) rather than personal.
The address you check is processed entirely in your browser. It is never sent to a server, logged, or stored.
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Email Validatorとは？
A bad email is a quiet form of lost contact — a typo at sign-up, a throwaway address that bounces a year later, or a role address that no one reads. This validator checks the structural format, surfaces common typos against real providers, flags disposable / throwaway services, and warns when an address is generic (admin@, support@) rather than personal.
Everything runs in your browser. The address is never sent to a server, never logged, and never stored. For a deliverability check (does the domain actually accept mail?), pair this with the DNS Lookup tool and ask for MX records.
使い方
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Paste an email address
Any address you want to check — a sign-up form input, a contact sheet row, or a pasted list.
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Read the verdict
Valid, Risky, or Invalid — plus a short list of every issue found.
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Accept the suggestion
If a typo was detected, copy the corrected address with one click.
使用例
A common typo
A one-letter domain typo (gmial instead of gmail).
[email protected]
結果： Risky · Possible typo: did you mean [email protected]?
A disposable address
A throwaway email service that should not be used for important signups.
[email protected]
結果： Risky · Domain is a known disposable / throwaway email service.
A role address
A team address that no specific person reads.
[email protected]
結果： Risky · "support" is a role address — it goes to a team, not a person.
よくある質問
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Last reviewed: 2026-09-25