OpenAnyFile
What is a .mod file?
ProTracker Module is an audio format developed by Karsten Obarski (Ultimate Soundtracker), first released in 1987. It is usually created by Amiga ProTracker, OpenMPT.
Four channels of 8-bit samples on the Amiga — the original tracker format that started chiptune and demoscene music.
File details
| Full name | ProTracker Module |
|---|---|
| Category | Audio |
| MIME type | audio/mod |
| Signature (magic bytes) | 4D 2E 4B 2E (M.K.) at offset 1080 |
| Developer | Karsten Obarski (Ultimate Soundtracker) |
| Introduced | 1987 |
| Opens with | Tracker music player |
| Uploaded? | No — read locally in your browser |
How to open a .mod file
OpenAnyFile routes .mod files to its tracker music player, which shows the song played live from its patterns and samples.
- Drop your .mod file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the tracker music player.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the song played live from its patterns and samples. Size, type, signature and checksums are always shown.
Does not work
Editing and saving back. OpenAnyFile is a viewer, not an editor — for changes you still need the original app.
Is it safe to open a .mod file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .mod files
Can I open a .mod file without installing software?
Yes. OpenAnyFile opens .mod files in your browser using its tracker music player. You get the song played live from its patterns and samples, with nothing installed and no account.
How do I know a file is really a .mod file?
Check its first bytes instead of its name. A genuine MOD file begins with 4D 2E 4B 2E (M.K.) at offset 1080. OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .mod file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.