SignTool Integrations

Klarseal is a code-signing certificate service for developers and businesses distributing Windows applications, drivers or installers. It offers Standard (OV) and Extended Validation (EV) certificates issued by Certum, while managing orders, invoices, application checks and status updates. Both certificate types use cloud signing: the private key is generated and held in the certificate authority’s hardware security module, rather than on a USB token. EV includes additional identity checks and is required to open a Windows Hardware Developer Program account for kernel-driver submissions. Klarseal also provides free companion tools: Sign my app, an MIT-licensed plugin that lets supported AI coding agents prepare Windows-file signing for user approval, and Sign my app for Windows, a utility to check and sign .exe, .dll and .msi files.