PPK to PEM or vice versa Conversion

There are 3 ways like -

1. With openssl utility, install it in Linux and run below command -

openssl pkcs8 -inform DER -in ppk_file.ppk -outform PEM -out pem_file.pem

2. Puttygen command in Linux

sudo apt install putty-tools

puttygen ppk_file.ppk -O private-openssh -o pem_file.pem

3. Puttygen in Windows, convert PPK to PEM:

Launch PuTTYgen application

Under File menu, click Load private key.

Select your .ppk file, and then choose Open.

Now, under the Conversions menu, click Export OpenSSH Key (force new file format).

Set a new name with the “.pem” extension and click the “Save” button