[ Free tool · Generate ]
DKIM Record Generator
Generate a DKIM key pair and the TXT record to publish, in your browser.
Domain
Selector
Key size
2048-bit is the recommended default; some DNS hosts can't hold 4096-bit keys.
[ About this tool ]
This DKIM generator creates an RSA key pair and the matching DNS TXT record locally using your browser's Web Crypto API.
How to read the results
- ›Publish the public key at <selector>._domainkey.<domain>.
- ›Install the private key only on your signing server.
- ›2048-bit keys may need to be split into multiple strings.
Frequently asked questions
Is the private key sent anywhere?
No. Keys are generated on your device and never leave the browser.
Learn more in our guide: DKIM (DomainKeys Identified Mail)
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