S3M Audio — A .s3m file is a S3M Audio. It is an audio format used to store music, voice and sound effects, either lossy or lossless.
Quick facts
What is .s3m
A .s3m file is a S3M 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/s3m. When serving .s3m over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to audio/s3m — and is delivered over HTTP via the Content-Type header.
How to open .s3m files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: audio/s3m
Common software that reads/writes .s3m:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .s3m files
How to create .s3m files
Frequently asked questions
Common options include VLC, Windows Media Player, Audacity. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .s3m extension.
audio/s3m is the media type identifier used for .s3m files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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