What is a PPK file?
A .PPK file is most often a PuTTY Private Key File. Developers use the PuTTY SSH client to securely connect to remote servers. The file stores encrypted authentication data. However, a .PPK file can also be a compressed ZIP resource package for games, or an XML data file for Polish employee pension plans. Because the .PPK extension has multiple meanings, we recommend using viewer.online/ppk to identify the actual format of your file.
How to open PPK files?
To use a PuTTY Private Key File, you normally load it into Pageant, the authentication agent for PuTTY. You can also edit or convert these keys using the PuTTYgen utility. If your .PPK file is a game resource archive, you can unpack it with a standard decompression tool like 7-Zip. For Polish pension plan files, you can use a basic text editor or official software.
Best practices and troubleshooting
Keep your private key files highly secure. Never share a .PPK file that contains private SSH keys. If you need to use your key with OpenSSH, you must convert it from the .PPK format to the standard .PEM format using PuTTYgen.
Software and tools
viewer.online/ppk can analyze .PPK files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
viewer.online/ppk is useful for identifying, inspecting, and understanding .PPK files without installing software or dealing with compatibility problems.