Is your website quantum-safe?

Check in seconds whether a website already uses post-quantum (hybrid ML-KEM) encryption. Free, no sign-up.

Free quick check

Check a domain

We connect to the website the way a modern browser does and report whether the connection used post-quantum key exchange such as X25519MLKEM768.

What the answer means

Yes: the website negotiated a hybrid post-quantum key exchange, so recorded traffic is protected against future "harvest now, decrypt later" attacks.

Partly: some tested addresses used post-quantum key exchange and others did not.

Not yet: the connection used classical key exchange only. It is secure today, but traffic recorded now could be decrypted by a future quantum computer.

The quick check tests your website only. Use the full CipherScope scan to check your email servers as well.

See how the world's largest banks compare in our PQC adoption tracker, and check the migration deadlines by country.