Primary tool · /check

Post-Quantum Domain Scanner

Two tiers run together: a browser self-test against Cloudflare's PQ research endpoint, and a server-side OpenSSL 3.6 + liboqs TLS handshake against the target you choose.

Browser self-test

This browser

Methodology · We fetch pq.cloudflareresearch.com as an opaque HEAD request. A successful fetch means your browser could reach a PQ-enabled TLS endpoint; whether the connection actually negotiated a PQ group depends on your browser version (X25519MLKEM768 ships in Chrome 124+, Firefox 132+, Edge 124+).

Deep scan · Server-side TLS handshake

Scan a domain

Corroborate with external scanners

QuReady

Real TLS handshake, OpenSSL 3.6, no signup. Mirror of this site's methodology.

QCready

Tests both server and browser PQC readiness in one view.

Wiz PQC Tester

Server TLS configuration audit with remediation advice.

Cloudflare PQ Test

Confirms whether your current browser connection to Cloudflare used a PQ KEX.