Find out if your HTTPS traffic is under attack

NoSnoop is a standalone, browser-independent security tool that will perform standard SSL handshakes to popular websites and examine the certificate chains received from each server.

NoSnoop will check for obvious cases (such as interception by a local proxy, your employer's SSL inspection gateways, or a malware infection), as well as more advanced attacks (for instance, if the root cert is valid but issued by an unexpected organization or country).

An entire scan typically takes less than 30 seconds.


Quick start

No installation needed! Just unzip to any folder, and launch.

Any alerts will be flagged in red.
Roots are verified against all 4 major trust stores (Microsoft, Mozilla, Apple, and Google).
This release is free for personal use. Licenses for commercial use will be available soon.


● Windows 7 or later
● 1MB disk space


I am an infosec consultant with 15 years of experience within various large organizations in technology, government and finance. Over the years, I have also released a number of Windows tools aimed at improving online security and privacy.


NoSnoop contains no adware, malware or sponsored content of any sort.

This website does not collect any personal information.

FAQ (Coming soon)