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Email Address Validator

Validate email address syntax one per line and see exactly why each invalid address fails.

Runs in your browserText → Text
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Example

Input
ada@example.com
bob@@example.com
carol@localhost
Output
✓ ada@example.com
✗ bob@@example.com — more than one @
✗ carol@localhost — domain "localhost" has no top-level domain (e.g. .com)

1 valid, 2 invalid

How to use the Email Address Validator

  1. Paste or type your Text into the input area, or open a file from your device.
  2. Adjust the options above the editor if the tool offers any.
  3. Review the Text result, then copy it or download it as a file.

Privacy and limitations

  • Your data is processed on your device and is not uploaded to any server.
  • Only the syntax is checked. Whether the mailbox exists cannot be known without contacting the mail server.

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