PuTTYgen

SSH key generator for secure Windows access

PuTTYgen is a focused Windows utility for creating the key pairs used with SSH connections, especially in PuTTY-based workflows. It is not a general password manager or a full networking suite; its job is narrower and clearer: generate a private key, produce the matching public key, and help you save or convert those keys for use with servers and cloud accounts.

In everyday use, PuTTYgen presents a simple dialog with a Generate button. After creating a key, you can add a passphrase, confirm it, then save the public and private parts separately. The public key text, which may begin with ssh-RSA, can be copied into an authorized_keys file or into the key field provided by a server control panel. The private key is commonly saved in PuTTY’s PPK format, but the tool also supports converting keys to other formats when needed.

One useful feature is the ability to open an existing private key and adjust its passphrase or comment before saving it again. You can also recreate or copy the associated public key, which is practical if you need to attach the same credential to a new cloud server or update access on an existing one. It also includes RSA key generation for the older SSH-1 protocol, which may matter in legacy environments.

The main drawback is approachability. The interface feels old-fashioned, and the app assumes you understand what private keys, public keys, passphrases, and server authorization files are. It guides the basic workflow, but it does not explain the security concepts in much depth.

PuTTYgen is best for Windows users who manage SSH access, use PuTTY, or need a free, purpose-built way to create and maintain SSH keys. Beginners can use it with instructions, while experienced users will appreciate its direct, no-frills design.