What is a .mo3 file?
A .mo3 file is a compressed Tracker audio. Its registered MIME type is audio/x-mo3, which places it in the audio family of formats.
MO3 is a binary format: the contents are not readable text, so opening it in a text editor shows scrambled characters.
Files of this type usually begin with the bytes 4D 4F 33. That signature is how programs recognise the format even when the extension is wrong or missing.
MO3 file format details
| Extension | .mo3 |
|---|---|
| Format | Compressed Tracker audio |
| MIME type | audio/x-mo3 |
| Category | Audio |
| Text or binary | Binary |
| File signature | 4D 4F 33 |
| Registered with IANA | No |
| Other extensions | None |
How to open MO3 files
| Windows | VLC media player is free and plays almost every audio and video format, MO3 included in most cases. Media Player and Films and TV handle the common ones. |
|---|---|
| Mac | QuickTime Player plays formats Apple supports. VLC or IINA play most others. |
| iPhone and iPad | The Files app plays formats Apple supports. VLC for iOS plays most others. |
| Android | Most gallery and music apps play common formats; VLC for Android plays almost everything. |
Can you convert a .mo3 file?
TapToConvert does not convert MO3 files yet. If you can export the file from its program as a common audio format, the audio converter can turn it into anything else.
MO3 file FAQ
What is a .mo3 file?
A .mo3 file is a compressed Tracker audio, with the MIME type audio/x-mo3.
How do I open a .mo3 file?
VLC media player plays most audio and video formats on Windows, Mac, iPhone and Android.
Is a .mo3 file safe to open?
MO3 files hold data rather than programs, but any file from an unknown source can be crafted to exploit the software that opens it. Keep that software up to date. The viewer on this page only reads the bytes and never runs anything.
What is the MIME type of .mo3?
audio/x-mo3. Web servers send this type so browsers know how to handle the file.
Is MO3 a text or binary format?
Binary. Its contents are not readable as text.
File type facts come from the IANA media type registry, the mime-db project and the freedesktop.org shared MIME database.