PuTTYgenfor Windows

PuTTYgen is a key generator tool used for creating pairs of public and private SSH keys. This software is one of the components of the open-source networking client called PuTTY. It can create various public-key cryptosystems, which are principally focused on secure data transmission and digital signature. Although it primarily collects keys in native formats, such as PPK files, users can easily convert them to any file format. PuTTYgen is a completely free program. You can use it from the PuTTY window or download it separately.

PuTTYgen is a handy networking environment that allows users to generate SSH keys easily. The app simplifies the process of generating new key pairs—both public and private. Moreover, it lets you load existing ones and make changes to them. It is not strictly related to PuTTY. However, PuTTY users will need it to create the SSH keys.