OpenAnyFile
What is a .pmx file?
MikuMikuDance Model (PMX) is a 3D/CAD format developed by Kyokuhoku, first released in 2011. It is usually created by MikuMikuDance, PMX Editor, Blender MMD Tools.
Anime-style character models with bones and morphs. Textures sit next to the file, so the shape shows even when they are missing.
File details
| Full name | MikuMikuDance Model (PMX) |
|---|---|
| Category | 3D & CAD |
| MIME type | application/x-pmx |
| Signature (magic bytes) | 50 4D 58 20 (PMX ) |
| Developer | Kyokuhoku |
| Introduced | 2011 |
| Opens with | 3D viewer |
| Uploaded? | No — read locally in your browser |
How to open a .pmx file
OpenAnyFile routes .pmx files to its 3D viewer, which shows an interactive model you can rotate and zoom.
- Drop your .pmx 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 3D viewer.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: an interactive model you can rotate and zoom. 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 .pmx 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 .pmx files
Can I open a .pmx file without installing software?
Yes. OpenAnyFile opens .pmx files in your browser using its 3D viewer. You get an interactive model you can rotate and zoom, with nothing installed and no account.
How do I know a file is really a .pmx file?
Check its first bytes instead of its name. A genuine PMX file begins with 50 4D 58 20 (PMX ). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .pmx 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.