$ sudo puttygen pemKey.pem -o ppkKey.ppk -O private Voila! The .pem files will quickly be converted to PuTTY native file format. Users can connect via PuTTY to remote servers from local systems using the newly created .ppk files on both Windows and Unix. Connect Using PuTTY Once the ....
Step 3 often causes problems, because the file selector is set to PPK so the PEM will not be visible even if you select the correct folder. Just change the filetype to *.* and every filetype will be visible. Upon import, PuTTYgen explains how to convert an SSH PEM to a PPK format ...