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.SPX·File Extension

SPX Audio — A .spx file is a SPX Audio. It is an audio format used to store music, voice and sound effects, either lossy or lossless.

Audioaudio/ogg

Quick facts

Extension.spx

File typeSPX Audio

MIME typeaudio/ogg

CategoryAudio

Charset—

CompressibleNo

What is .spx

What is a .spx file?

A .spx file is a SPX Audio. It is an audio format used to store music, voice and sound effects, either lossy or lossless.

In the mime-db registry it maps to audio/ogg, and it is marked as non-compressible. When serving .spx over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to audio/ogg — and is delivered over HTTP via the Content-Type header.

How to open .spx files

Use VLC or Windows Media Player to open and edit .spx files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: audio/ogg

Common software that reads/writes .spx:

VLCWindows Media PlayerAudacityQuickTime

Relation chain

.spxextension of

format

SPX Audioserved as

mime type

audio/oggsent via header

http header

Related extensions

Related MIME types

Common uses

Music and podcasts
Sound effects
Voice recordings

How to edit .spx files

Open the file with VLC, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .spx files

Create a new file and save it with the .spx extension, or export this format from VLC.

Frequently asked questions

What programs can open .spx files?

Common options include VLC, Windows Media Player, Audacity. You can also open many of these files with built-in viewers or a browser.

How do I create a .spx file?

Create a new file in any text editor or the app that owns the format and save it with the .spx extension.

What is the relationship between .spx and the audio/ogg MIME type?

audio/ogg is the media type identifier used for .spx files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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