Free DKIM Key Generator
Generate DKIM key pairs and DNS records for your domains. Proper formatting for any email service.
Need help setting up DKIM? Read our setup guide.
What is a DKIM key generator?
DKIM requires a public/private key pair. The private key signs your outgoing messages. The public key goes into DNS so receivers can verify the signature. If the key is too short, incorrectly formatted, or doesn't match what your mail server is using, DKIM verification fails.
Most email services generate and manage DKIM keys for you, but self-hosted mail servers, custom setups, and key rotations require you to generate your own. The key needs to be the right size (2048-bit is the current standard), published under the right selector, and formatted correctly as a DNS TXT record.
Our free generator creates DKIM key pairs ready for use. Choose your key size, specify your selector, and get both the private key for your server and the DNS record for publication.
| Feature | Details |
|---|---|
| Instant key generation | Create secure DKIM key pairs in seconds with your choice of key size. |
| DNS record output | Get properly formatted TXT records ready to paste into your DNS provider. |
| Multiple key sizes | Generate 1024-bit or 2048-bit keys depending on your DNS provider's TXT record limits. |
| Setup verification | Verify your DKIM configuration after setup to confirm everything works. |
| Multiple selectors | Generate keys for different selectors to support multiple sending services. |
| Easy export | Download keys or copy them directly to your clipboard. |
Done creating? Now monitor them with our Email Deliverability Suite
Monitor SPF records for changes and DNS lookup limit issues.
Monitor DKIM keys for changes and validity.
Monitor DMARC policy for changes affecting failed email handling.
Monitor MX records for changes that could break inbound email.
Monitor BIMI record and logo URL for brand display issues.
Check major blacklists daily for your domain and sending IPs.
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DKIM Creator & Checker
- Record changes
- Key presence
- Key validity
- Selector configuration
Email Deliverability
- Up to 3 domains
- Daily checks
- SPF, DKIM, DMARC, BIMI, MX monitoring
- Blacklist monitoring
- Email alerts
Email Deliverability Pro
- Unlimited domains
- Up to 5 co-recipients
- Custom check timing
- On-demand manual checks
- Bulk CSV import
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