This is a collection of tools used to manipulate certificate files. Many operations like viewing a x509 certificate require using tools like openssl. Some people don't have easy access to a linux or mac operating system. In addition, learning the syntax and required inputs to effectively use openssl can be challenging.
This website makes it easier to some of the basic tasks involving certificates totally within the browser. All operations are done purely in javascript client side. Absolutely NO data is sent to a server or backend.
This tool was created by Jay Young supported by Cisco. Any issues with the site can be reported to via the GitHub repo.