KWM is file format for storing private keys created with WebMoney Keeper WinPro (Classic), a private finance application available for Microsoft Windows. The application is regularly updated and enhanced by the developer.

KWM files store data in binary format and are encrypted by default, so it is not possible to view the contents of such files. WebMoney Keeper can access user’s private keys stored in KWM file in order to process payments or fund transfers and access certain functions. KWM files should be stored securely and access to them should be restricted to privileged users.