EFU File

What are EFU files and how to open them

Are you having problems opening an EFU 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 EFU files.

What is an EFU file?

EFU files have multiple uses, and Epson Firmware Update Package is one of them. Read more about the other uses further down the page.

Epson Firmware Update Package

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open EFU files

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

While we have not verified the app ourselves yet, our users have suggested a single EFU opener which you will find listed below.

Last updated: January 25, 2025

All known file formats using extension .EFU

While Epson Firmware Update Package is a popular type of EFU-file, we know of 2 different uses of the .EFU file extension. Different software may use files with the same extension for different types of data.

Everything File List

We know that one EFU format is Everything File List. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

EFU opener for Windows

We have identified one EFU opener that is compatible with this specific type of EFU file.

Various apps that use files with this extension

These apps are known to open certain types of EFU files. Remember, different programs may use EFU files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about EFU file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.