Certify One SSL / TLS Validator

Certify One SSL / TLS Certificate Chain Validator

Certify One is a program designed to help you validate SSL / TLS certificate chains. Why would you want such a program? In recent years, browsers have become much stricter in regard to handling SSL / TLS certificates. For example, all major browsers will warn or even block access to sites where the SSL / TLS certificate is expired, self-signed, or revoked. Similarly, access may be blocked if the certificate chain of trust (e.g. root CA or intermediate certificates) is incorrect, certificates in the chain of trust are missing, or have been revoked. Hence, it's important to be able to audit the validity of certificates, certificate chains and test whether certificates have been revoked. For more information please see the Certify One product page.


1. Download

Download Certify One for Microsoft Windows

Download Certify One 1.0.10

Download Certify OneNovember 2021

For 64-bit / Win64 / x64 / ARM64EC Microsoft Windows Operating Systems


7-day trial. Please see the Change Log.


2. License

Certify One is a subscription-based product. The cost of the subscription is $US95 per year. You can grab a subscription for 70% off for a limited time. Please follow this link to purchase your subscription. 


3. Installation

Once you have downloaded the installer, double-click the installer and follow the installation instructions.


4. Using Certify One

Populate the list of Scan Targets. Then click the "Scan All" button. You can also Schedule scans. If you double click on any host you will be provided detailed scan information. You can test Certify One with valid, expired, and revoked certificates via ssl.com or badssl.com.

Certify One Scan Targets

You will be able to see a graphical summary of the tests on the Dashboard once the scans have been completed.


Certify One Scan Dashboard


You can also query DNS CAA records via the command line! For example:

Certify One Query DNS CAA Record

Bugs? Issues? Feature Requests?

We are actively developing Certify One. Tell us what you think! Let us know what features you would like to see in the product. All feedback is gratefully received!