Email Validator

Validate email format and MX records instantly

🔒 Files never leave your browser

How to Use Email Validator

Enter email

Type or paste an email address (or switch to bulk mode).

Validate

Click Validate to check format and MX records.

Review

See format check and MX record results.

Why Choose AllTools Email Validator?

  • ✓ RFC 5322 format check
  • ✓ Live MX record lookup
  • ✓ Bulk validation mode
  • ✓ Domain MX caching
  • ✓ Visual checklist
  • ✓ No data stored

Why Use This Tool

  • ★ Validate email format using RFC 5322 rules before sending
  • ★ Check MX records to verify the domain can receive email
  • ★ Bulk mode for validating entire lists at once
  • ★ No data leaves your browser — safe for sensitive email lists

Email Validation for Developers

Email validation is crucial before sending transactional emails, marketing campaigns, or user registration confirmations. Format validation catches typos and invalid structures. MX record checks verify that the domain is configured to receive email. This tool combines both checks — RFC 5322 format validation plus live MX record lookup via Cloudflare DNS-over-HTTPS — entirely in your browser.

Related Resources

Check DNS propagation → Test email regex patterns → Parse URL components →

Frequently Asked Questions

Does this check if the email actually exists? ▼
No. It validates the format and checks if the domain has MX records configured. Verifying a specific mailbox requires sending a test email.
How does MX lookup work without a server? ▼
We use Cloudflare DNS-over-HTTPS API, which supports CORS — the lookup happens directly from your browser.
Does this work on mobile? ▼
Yes. AllTools is mobile-friendly and works on all modern browsers including iOS and Android.

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