A daily updated filename extension database!

Details of the .efi file extension

The table below provides useful information about the .efi file extension. It answers questions such as:

  • What is the .efi file?
  • What program do I need to open a .efi file?
  • How can the .efi file be opened, edited or printed?
  • Where can I find the specifications for .efi?
  • Which MIME-type is associated with the .efi extension?
  • How can I convert .efi files to another format?
  • What are other, similar filename extensions to .efi?

We hope you find this page helpful and a valuable resource!

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

.efi file extension details

Extensible Firmware Interface

Extensible Firmware Interface .efi file icon
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: -
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
EFI aliases:
EFI related links:
EFI related extensions:
Mac OS X EFI Image

Other types of files may also use the .efi file extension.

.efi file extension error

The .efi file extension is often given incorrectly!

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

ei, eif, ffi, eti, fi, ef, eci, efo, edi, efl, eri, efu, sfi, evi, dfi

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Electric Image
Envex Import Format File
Gforth Image File
ETI Stream
Unknown FFI File
Fortran Interface File
Diploma Exam File
EASE Focus Data File
Ettercap Info Log
ENVI-met Information File
open .efi file

Can't open a .efi file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .efi file association, check the FAQ.

.efi file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .efi file extension, write to us!

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