Convert PuTTYGen keys

1. Open PuTTYGen locally and load the private key you want to convert.
2. Select Conversions > Export OpenSSH key from the application menu. Save the converted key to a local location under the.ssh directory in your user profile folder (for example C:\Users\youruser\.ssh).
3. Validate that this new local file is owned by you and no other user has permissions to access it.