Post-quantum cryptography, made inspectable
Know what protects
your connection.
A website, an app, a server, a phone. Each has a different answer. CheckPQC helps you gather the evidence—with a browser check, readable local scripts and guides for the tools you use.
Free reference material. No account, API key or CheckPQC installation.
What are you checking?
Websites & services
Scan a public domain for free, or check HTTPS, email and database listeners from your own machine.
Browsers & devices
Check this browser connection, then follow the guide for your OS and other applications.
SSH & infrastructure
Read the negotiated exchange for SSH, SFTP and Git over SSH.
Apps, messaging & VPNs
Find protocol-specific evidence and recognize what cannot be tested externally.
Understand the result.
Follow the short learning path: what PQC protects, why systems differ, and which evidence to look for.
Learn the essentials →Build your readiness plan.
Keep a private inventory of your systems, unknowns, owners and next actions. Save or export only when you choose.
Open the worksheet →An answer backed by evidence.
We distinguish a negotiated post-quantum exchange from local software support and vendor claims. If a protocol hides the information, the answer is unknown—not a reassuring green badge.
One TLS result cannot certify a whole device, a messaging conversation, or the connection behind a CDN. Each guide explains what its check proves and what it leaves open.
Read the methodology