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Free DKIM record generator

Free DKIM record generator for selector-based email signing

Use this free DKIM record generator to create an RSA key pair, generate a DNS-ready DKIM TXT record, and export PEM keys for selector-based signing. It is built for teams setting up a new sender, rotating selectors, or replacing hand-built DKIM records before the next release.

Generate a free DKIM record

Create a selector, TXT record, and PEM key pair

Enter the domain, choose a selector, and pick the RSA key size. Generation runs in the browser and returns the DNS record plus both PEM exports.

How the output should be used

  • Publish the generated TXT value in DNS at the selector hostname.
  • Configure the sender or ESP with the generated private key PEM.
  • Keep the public key PEM only for review or audit reference. Do not publish it separately.

Generates key material in-browser for safer setup review.