.PF File Extension

2 file types use the .pf file extension.

Private File

Developer Smith Micro
4.0  |  78 Votes

What is a PF file?

A PF file is a password-protected file compressed and encrypted by Stuffit Deluxe, a popular file compression and expansion utility. It is similar to a .SIT file, but requires a password to decrypt and decompress. PF files are often used for archiving confidential or personal data.

More Information

You can open PF files with Stuffit Deluxe in Windows or macOS. However, the PF files will not open unless the correct password is entered. Also, it is important to extract the contents of a PF file on a safe device because the contents, which may be documents, images, videos, etc., are most likely sensitive.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open PF files

Windows Prefetcher File

Developer Microsoft
3.7  |  29 Votes

A PF file may also be a log file used by Prefetcher, a Windows Memory Manager component that speeds up the boot process and application launches. It contains a record of data access events recorded during the boot process or an application launch. PF files allow Windows to more efficiently access and load resources when you start Windows or open a program.

More Information

Microsoft introduced the Prefetcher in Windows XP. The Prefetcher records what data is accessed when the system boots or an application launches. It then saves a record of these data access events in a PF file. When you start Windows or open an application for which a PF file exists, Windows uses the related PF file to more quickly load the data needed to complete that process.

Each PF file is named for the process or application with which it is used. For example, the PF file used as part of the system boot process is always named NTOSBOOT-B00DFAAD.PF; the PF file used when launching Mozilla Firefox is named FIREFOX.EXE-25FC0A66.PF.

All PF files are stored in Windows' C:/​Windows/​Prefetch directory. This directory may also contain other Prefetch-related files.

How to open a PF file

PF files are not meant to be opened.

Programs that open PF files

Microsoft Prefetcher

Verified by FileInfo.com

The FileInfo.com team has independently researched all file formats and software programs listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.