Pretty Good Privacy public key ring data file
File type: Internet related file
The PUBKR file extension identifies a Pretty Good Privacy public key ring data file.
The file belongs to Pretty Good Privacy for Microsoft Windows and stores public-key information used by PGP.
File type category:
Internet related file
Date updated: September 27, 2026
Pretty Good Privacy uses a PUBKR file to store a collection of public keys and associated key information. PGP uses these keys to encrypt data for recipients and to verify digital signatures.
The file is part of PGP's key-management system rather than a document intended for direct editing. The software reads the public key ring when it needs to find a recipient's public key or check a signature.
PUBKR is a legacy file type associated with the Microsoft Windows edition of Pretty Good Privacy.
Open a PUBKR file with Pretty Good Privacy for Microsoft Windows, using the program's key-management or key-ring commands. The file is normally opened or imported from within PGP rather than by double-clicking it.
Do not edit the file with a text editor, because key-ring data is managed by the PGP software.
A PUBKR file is not normally converted into a document format. If the file can be read by Pretty Good Privacy, use its key-management tools to export the public keys in a format supported by another compatible application.
Keep the original file as a backup, because changing its extension does not convert its key-ring data.
Software applications that handle other tasks involving pubkr files:
Microsoft Windows
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