Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .efi

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .efi file?
  • Which program can create the .efi file?
  • Where can you find a description of the .efi format?
  • What can convert .efi files to a different format?
  • Which MIME-type is associated with the .efi extension?
Extensible Firmware Interface .efi file icon

Extensible Firmware Interface

EFI file is an Extensible Firmware Interface. The Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI is meant to replace the Basic Input/Output System (BIOS) firmware interface.
Category: Application files
Application: -
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Mac OS X EFI Image

Other types of files may also use the .efi file extension. If you have helpful information about .efi extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

TI bqEASY Data Flash Image
The Bat! Encrypted Message Index
Ettercap Info Log
ENVI-met Information File
Diploma Exam File
Ensoniq KT Audio Data
Encryptafile Encrypted File
EASE Focus Data File
Encryptafile Public Key

The .efi filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

efl (1), ef (1), wfi (1), eci (1), rfi (1), dfi (1), ffi (1), eti (1), eif (1), egi (1), efo (1), efk (1), edi (1), sfi (1), ebi (1)

Can't open a .efi file?

If you want to open a .efi file on your computer, you just need to have the appropriate program installed. If the .efi association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.efi

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android