4PK File

What are 4PK files and how to open them

Are you having problems opening a 4PK file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your 4PK files.

What is a 4PK file?

A .4PK file is a Perfect Keyboard Macro Set file.

The Perfect Keyboard Macro Set format (extension .4PK) stores sets of keyboard macros created by the Windows program Perfect Keyboard (by Pitrinec Software). These files hold collections of user-defined macros - actions, text shortcuts, hotkeys and triggers - so users can run repetitive tasks by typing shortcuts, pressing hotkeys, or scheduling the macros.

Perfect Keyboard creates and edits .4PK files. Each macro file can contain many macros arranged into groups, each with triggers (hotkeys, text shortcuts, schedules) and scope (which applications/windows are affected). The program allows exporting all or some macros as XML. Macro files may be loaded at startup or opened manually.

Macros inside .4PK can have several types: simple text insertion, clipboard macros, or general macros that combine keyboard actions, mouse actions, file operations, variable handling, window manipulation, and more. Users can record, write, edit in "Steps" or "Code" mode. File-level settings can include encryption (AES), protected editing, and other options.

Identification: .4PK files are OLE Compound File (also called Microsoft proprietary compound binary) starting with the 16-byte signature D0 CF 11 E0 A1 B1 1A E1 00 00 00 00 00 00 00 00. The internal data include strings like "ROOT ENTRY" and "4PK".

How to open 4PK files

Important: Different programs may use files with the 4PK file extension for different purposes, so unless you are sure which format your 4PK file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 16, 2026

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