DFX File

What are DFX files and how to open them

Are you having problems opening a DFX 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 DFX files.

What is a DFX file?

A .DFX file is a DeskFX Effect file.

DeskFX Effect format files store audio effect preset settings created by the DeskFX Audio Effect Processor program by NCH Software. They represent saved configurations of filters like equalizers, reverb, amplification, distortion, etc., that DeskFX will apply to audio output in real time. These files allow reuse of custom effect chains or quick switching between different audio profiles such as "Restaurant," "Gym," "Retail," etc.

DeskFX writes these files. The user sets up effects in the program and then saves their current effect chain or preset, which is stored in this format. When DeskFX loads a preset file, it applies all the contained effect parameters to the audio stream. Files are used internally by DeskFX for its preset management system.

Files typically begin with a specific binary signature: the first bytes are 0x6C 0x73 0x64 0x66 0x01 0x00 0x2A 0x00 at offset 0, which reads in ASCII as "lsdf..*" (with non-printable characters around it).

How to open DFX files

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

While we have not verified the apps ourselves yet, our users have suggested ten different DFX openers which you will find listed below.

Last updated: October 27, 2026

Various apps that use files with this extension

These apps are known to open certain types of DFX files. Remember, different programs may use DFX 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 DFX file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.