Convert a .pem file to .ppk or a .ppk file to .pem (2024)

I want to convert my Amazon Elastic Compute Cloud (Amazon EC2) Privacy Enhanced Mail (.pem) file to a PuTTY Private Key (.ppk) file. Or, I want to convert a .ppk file to a .pem file.

Short description

PuTTY doesn't natively support the private key format (.pem) that Amazon EC2 generates. Before you can use PuTTY to connect to your instance, you must convert your private key into a .ppk file. Use the PuTTYgen tool for this conversion.

Resolution

Windows - install PuTTYgen

Most Windows operating systems have PuTTY installed. If your system doesn't, then download and install PuTTYgen. For more information on PuTTYgen, see PuTTYgen on the SSH website.

Windows - convert a .pem file to a .ppk file

Start PuTTYgen, and then convert the .pem file to a .ppk file. For detailed steps, see Convert your private key using PuTTYgen.

Windows - convert a .ppk file to a .pem file

  1. Start PuTTYgen. For Actions, choose Load, and then navigate to your .ppk file.
  2. Choose the .ppk file, and then choose Open.
  3. (Optional) For Key passphrase, enter a passphrase. For Confirm passphrase, re-enter your passphrase.
    Note: Although a passphrase isn't required, it's a best practice to specify one. This is a security measure to protect the private key from unauthorized use. A passphrase makes automation difficult, because users must manually log in to an instance or copy files to an instance.
  4. From the menu at the top of the PuTTY Key Generator, choose Conversions, Export OpenSSH Key.
    Note: If you didn't enter a passphrase, then you receive a PuTTYgen warning. Choose Yes.
  5. Name the file and add the .pem extension.
  6. Choose Save.

Unix or Linux - install PuTTY

Install PuTTY, if it's not already on your system.

The Extra Packages for Enterprise Linux (EPEL) repository contains the PuTTY package. You must activate the EPEL repository before you install PuTTY.

Note: Amazon Linux 2023 (AL2023) doesn't support EPEL. For more information, see Extra Packages for Enterprise Linux (EPEL).

To install PuTTY, run one of the following commands:

RPM-based

$ yum install putty

Dpkg-based

$ apt-get install putty-tools

Unix or Linux - .pem and .ppk files

The .ppk file is supported only on Windows PuTTYGen. It must be converted to a .pem file to be used on Linux. Run the puttygen command to convert a .ppk file in to a .pem file:

$ puttygen ppkkey.ppk -O private-openssh -o pemkey.pem

Similarly, you can use the puttygen to convert a .pem file to a .ppk file:

$ puttygen pemKey.pem -o ppkKey.ppk -O private

Related information

Amazon EC2 key pairs and Amazon EC2 instances

Convert a .pem file to .ppk or a .ppk file to .pem (2024)

FAQs

How to convert .ppk file to .pem file? ›

Windows - convert a . ppk file to a . pem file
  1. Start PuTTYgen. For Actions, choose Load, and then navigate to your . ...
  2. Choose the . ...
  3. (Optional) For Key passphrase, enter a passphrase. ...
  4. From the menu at the top of the PuTTY Key Generator, choose Conversions, Export OpenSSH Key. ...
  5. Name the file and add the . ...
  6. Choose Save.

How do I create a .PPK file? ›

On how to generate a PPK file, follow these steps:
  1. Download and open PuTTYgen from the PuTTY Download Page.
  2. Click the Load button and locate the private SSH key you downloaded. ...
  3. Enter the password for your SSH Key.
  4. Click the Save private key button to create the PPK file.

How do I convert a file to PEM? ›

Use the following command to convert a base64-encoded .cer file to a .pem format file:
  1. Syntax: openssl x509 -in <path-to-cer-file> -outform pem -out <path-to-pem-file>
  2. Example: openssl x509 -in C:\Certificates\AnyCert.cer -outform pem -out C:\Certificates\AnyCertInPem.pem.
Mar 3, 2024

How to convert PEM to PPK using WinSCP? ›

PEM => PPK

If it is not available, choose SSH-2 RSA. Choose Save private key to save the key in the format that PuTTY can use, choose . You can choose to save the key with or without a passphrase. Now the private key is in PPK format that can be used with the PuTTY's SSH client.

How to convert private key to ppk? ›

To convert a private Mac/Linux (OpenSSH-style) key to a Windows (PPK-style) key:
  1. Download PuTTYgen.
  2. Launch PuTTYgen. ...
  3. Browse to and open the OpenSSH-style key (id_rsa)
  4. Click the Save private key button.
  5. When prompted "Are you sure you want to save this key without a passphrase to protect it?" choose Yes.
  6. Save the file.

How do I manually create a pem file? ›

How to Generate a . pem File From a Private Key?
  1. Open a terminal or command prompt.
  2. Navigate to the directory with your private key.
  3. Run this command: openssl rsa -in private.key -outform PEM -out private.pem.
Dec 23, 2023

What is the difference between PPK and pem file? ›

ppk files are specific to PuTTY and use a proprietary format, . pem files use the widely used ASCII text format and can be used to store various types of keys. Despite their differences, both formats serve the same purpose and can be used interchangeably in various cryptographic applications.

What is a .ppk file? ›

what is a . ppk file? Files created by PuTTYgen are known as PPK files. PPK files are PuTTY Private Key Files developed by Putty and they serve as storage for the private keys the program generated. These files are used to enable communication securely with another party having the corresponding public key.

How to use .ppk file in PuTTY? ›

Open PuTTY and navigate to Connection > SSH > Auth > Credentials below the 'Category' section. Click the Browse button near the Private key file for the authentication field. Select the . ppk file you generated and then click Open.

How do I convert a PEM file to plain text? ›

2 Answers
  1. Copy and paste your file (to retain your original file) ie: 35544arrtsfevctdtys767.crt to 35544arrtsfevctdtys767-copy.crt.
  2. Rename your COPIED file (35544arrtsfevctdtys767-copy. crt) to name-of-your- choice. TXT i.e. abc. ...
  3. You now have the TEXT version of your file...
Jan 18, 2018

How do I convert a PEM file to a .p12 file? ›

Convert a PEM Certificate to PFX/P12 format
  1. Download and install version 1.0. 1p.
  2. Run the following command format from the OpenSSL installation bin folder. openssl pkcs12 -export -out Cert.p12 -in cert.pem -inkey key.pem -passin pass:root -passout pass:root.

What can I use to open a PEM file? ›

To open a . pem file, text editors like Notepad or VI can be used. The contents can also be viewed using openssl commands.

How to convert PEM file to PPK? ›

PEM to PPK conversion steps
  1. Download PuTTYGen from puttygen.com.
  2. Open PuTTYGen and click the Load button.
  3. Set the filetype to *. * so the AWS PEM file is visible.
  4. Select your PEM file and PuTTYGen will import it.
  5. Click Save Private Key and PuTTYGen will convert the PEM to a PPK file.
Feb 8, 2022

How do I use PPK in WinSCP? ›

1 Answer
  1. Open Winscp.
  2. Go to Session window, fill the details with Host name Username and password.
  3. Click on Edit button, then it will highlight the Advanced button.
  4. Click on that,
  5. select SSH → Authentication on the left side,
  6. select the path of Private key file.
Aug 18, 2020

What is a PEM file? ›

Privacy Enhanced Mail (PEM) files are a type of Public Key Infrastructure (PKI) file used for keys and certificates. PEM, initially invented to make e-mail secure, is now an Internet security standard.

How to convert private key to pem? ›

Convert your user key and certificate files to PEM format.
  1. Get the . key. pem file. For example: openssl pkcs12 -nocerts -in my.p12 -out .key.pem.
  2. Get the . cert. pem file. ...
  3. Remove the passphrase from the key. For example: openssl rsa -in .key.pem -out key_nopass.pem mv key_nopass.pem .key.pem.

How to generate pem from PPK in Mac? ›

How to convert putty ppk to pem on macOS
  1. -O private-openssh : save the output as a SSH-2 private key.
  2. -o new_key. pem : save the output to new_key. pem.
Mar 28, 2024

How do I export a certificate for that key to pem format? ›

Procedure
  1. On the Windows system, open Certificate Manager (certmgr.exe).
  2. Right-click the certificate to export and select All Tasks > Export.
  3. Select options in the Certificate Export Wizard. Select Base-64 encoded X. 509 (. CER) for the file export format.
May 31, 2019

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