SSH and PuTTY keys are of different formats and will have to be converted to each other’s format if you want to use the same key between the 2 programs. Follow these steps to convert SSH‘s key to PuTTY‘s.

  1. Download PuTTY Key Generator (puttygen.exe) from the following URL.
  2. Launch the program and click on the Load button.
  3. Set the Files of type to All Files (*.*) and select your SSH‘s key file.
  4. Enter your key’s passphrase if prompted.
  5. A prompt will pop up once conversion is successful. Click on Save private key.
  6. Choose the filename and folder to save the file to.