SPX File

What are SPX files and how to open them

Are you having problems opening a SPX 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 SPX files.

What is a SPX file?

SPX files have multiple uses, and Speex-encoded Audio is one of them. Read more about the other uses further down the page.

Speex-encoded Audio File

These files are Speex audio files. What is special about .spx is that it is a file format that is free of any patent restrictions since it is BSD licensed.

An audio file encoded and compressed in Speex will typically have the .spx file suffix on its name. Speex is primarily used for speech. It is an open-source software library used in many different audio creation and conversion products.

There are many speech audio formats, but most of them are proprietary and, not to miss, expensive. And in the past, many utilized speech audio files to broadcast previous news and messages and to place speech on video games. However, because these formats are proprietary and expensive, many smaller development studios could not afford them. To solve this, the Speex project was created. This project aims to provide a free format that can be used by everybody.

Speex has now largely been replaced by the Opus format.

How to open SPX files

We have identified four SPX openers that are compatible with this specific type of SPX file.

Programs that open Speex-encoded Audio files

Last updated: January 22, 2025

All known file formats using extension .SPX

While Speex-encoded Audio File is a popular type of SPX-file, we know of 2 different uses of the .SPX file extension. Different software may use files with the same extension for different types of data.

Spectrum 512 Extended Bitmap

We know that one SPX format is Spectrum 512 Extended Bitmap. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

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

Various apps that use files with this extension

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