Windows users can also convert a PPK file to PEM using PuTTYgen utility. Assume you already have downloaded Puttygen from its official download site.

Next, follow the steps to convert PPK to PEM:

  1. Launch PuTTYgen application
  2. Under File menu, click Load private key.
  3. Select your .ppk file, and then choose Open.
  4. Now, under the Conversions menu, click Export OpenSSH Key (force new file format).
  5. Set a new name with the “.pem” extension and click the “Save” button

    6. Converting PPK to PEM
    Converting PPK to PEM