OpenAnyFile
What is a .lwo file?
LightWave Object is a 3D/CAD format developed by NewTek, first released in 1990. It is usually created by LightWave 3D.
An IFF-based mesh format from LightWave, used in Babylon 5 and Star Trek VFX in the 90s.
File details
| Full name | LightWave Object |
|---|---|
| Category | 3D & CAD |
| MIME type | application/x-lwo |
| Signature (magic bytes) | 46 4F 52 4D .. 4C 57 4F 32 (FORM LWO2) |
| Developer | NewTek |
| Introduced | 1990 |
| Opens with | 3D viewer |
| Uploaded? | No — read locally in your browser |
How to open a .lwo file
OpenAnyFile routes .lwo files to its 3D viewer, which shows an interactive model you can rotate and zoom.
- Drop your .lwo 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 .lwo 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 .lwo files
Can I open a .lwo file without installing software?
Yes. OpenAnyFile opens .lwo 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 .lwo file?
Check its first bytes instead of its name. A genuine LWO file begins with 46 4F 52 4D .. 4C 57 4F 32 (FORM LWO2). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .lwo 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.