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.EFI File Extension

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File TypeExtensible Firmware Interface File

DeveloperUEFI Forum
Popularity
3.9 (21 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySystem Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

Definition

System file used by both Intel-based computer systems and computer devices such as AppleTVs; contains system-level data that executes between the operating system and the firmware; used for staging firmware updates, booting operating systems, and running pre-boot programs.

More Information

Using EFI files, systems can hand off the pre-boot process to a controlled environment. For example, EFI files are sometimes included with firmware updates and are loaded into the device's EFI System partition during the boot process. Here, the executable content in the EFI file safely runs the procedures necessary to update the device.

NOTE: The EFI specification, originally developed by Intel, was updated to the UEFI specification, which stands for "Unified Extensible Firmware Interface." The UEFI standard is maintained by the UEFI Forum.

Programs that open EFI files
Updated 11/15/2010

FileInfo - The File Extensions Database

This page contains information about the .EFI extension and its known file associations. Our goal is to help you understand what an EFI file is and how to open it.

The Extensible Firmware Interface file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and therefore do not publish any information we have not verified.

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