BluebirdBluebird
Home/DKIM Key Pair Generator

DKIM Key Pair Generator

Generate a 1024 or 2048-bit DKIM RSA key pair entirely in your browser.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Enter details
  2. Run check
  3. Copy result
How this works
  1. 1
    Pick key size

    2048-bit is the modern default. Higher = stronger but longer DNS record.

  2. 2
    Generate the keys

    A private key stays with you, and a public key goes into your DNS as a TXT record.

  3. 3
    Copy both parts

    Give the private key to your mail server, add the public TXT record at DNS. DKIM signs your outbound mail.

Watch: form → DKIM key pair
How this works
  • Pick a key size (2048-bit is the modern recommendation).
  • Choose a selector — a short label like bluebird or mail2026.
  • Add the TXT record to DNS and configure your mail server with the private key.
Keys are generated by your browser's Web Crypto API and never leave this page.

Rate DKIM Key Pair Generator

One tap. Anonymous. Helps others find the good tools.

No account, no email, no tracking — just a 1–5 number.

Be the first to rate