DKIM Checker — Find & Validate DKIM Records (Free)

Free — no credit card. Sign in with Google (free) to keep checking and save your results; Lifetime unlocks the full lists.

What you get

Keys found

Every selector with a published key

Key strength

1024 / 2048-bit RSA or Ed25519

Service

The email platform behind each selector

Record

The raw DKIM record, parsed

About the DKIM Record Checker

DKIM signs every email you send with a private key; receivers check the signature against a public key published in DNS at selector._domainkey.yourdomain. A valid DKIM signature proves the message wasn't changed and really came from you.

Enter your domain and, if you know it, the selector (found in an email's DKIM-Signature header as s=). Without a selector, Nuqti tries 50 selectors used by popular email services. For each key found you see its type, length and status.

How to use it

1Enter a domainLike example.com — no need for https://.
2Watch the check run liveEach step appears the moment it finishes — no waiting on a blank screen.
3Sign in free with GoogleSave your results and keep using every Nuqti tool on the free plan.

Frequently asked questions

What is a DKIM selector?

A name that lets one domain have several DKIM keys (one per service). Find it in a sent email's headers: DKIM-Signature: … s=selector.

Is 1024-bit DKIM enough?

2048-bit is recommended today. 1024-bit still works but is weaker; below 1024 is unsafe.

Why wasn't my DKIM found?

Your selector may be custom. Open a sent email, view the original headers, copy the s= value and enter it in the selector box.

What does 'revoked' mean?

The record exists but its key (p=) is empty — the key was deliberately disabled.

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