📧 Utility Tools

Email Validator

Check if email addresses are valid in format. Validate single addresses or bulk-check hundreds at once — all in your browser.

Single Email Check

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Bulk Email Validator

Enter one email per line (up to 1000)

📧 Email Validation Explained

Email validation checks whether an email address is correctly formatted according to RFC 5322 standards. It does not confirm whether the mailbox actually exists (that requires a live SMTP check), but it catches the vast majority of typos and formatting errors.

What Gets Checked

  • Format validity — Must match local@domain.tld pattern.
  • Local part — Characters before @ must contain only valid characters. No double-dots, no leading/trailing dot.
  • @-sign presence — Exactly one @ symbol required.
  • Domain — Must contain at least one dot, valid characters only.
  • TLD — Top-level domain must be 2–63 characters, letters only.
  • Length — Total email must not exceed 254 characters (RFC 5321).
  • Common typos — Detects misspelled domains like gamil.com, yaho.com, outook.com.

Why Validate Emails?

  • Reduce bounce rates in email campaigns.
  • Prevent fake sign-ups on your web application.
  • Improve data quality in your CRM or database.
  • Catch typos at the point of entry before users get frustrated.
  • Save email sending costs by not sending to invalid addresses.

Limitations

This tool validates email format only. To verify if a mailbox actually exists, you need an SMTP verification service. Common reasons a format-valid email may still not deliver: the domain has no mail server (MX record), the mailbox doesn't exist, or the mailbox is full.