LWO to FBX Converter
FileFlip converts LWO to FBX entirely inside your browser, using Assimp compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an LWO file to FBX?#
- Drop your LWO file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to FBX and the conversion starts on its own. FileFlip downloads 11.2 MB of WebAssembly the first time and nothing after that, then runs Assimp on your own machine.
- Save the FBX file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting LWO to FBX lose quality?#
Not in the sense of pixels or samples. Converting LWO to FBX rebuilds the file in FBX's own model rather than re-encoding it, so everything FBX can represent comes through exactly and anything it cannot has to be dropped. Expect the geometry to be exact, and anything the target has no place for, such as a rig, to be left behind.
Is it safe to convert LWO files online?#
Yes, because nothing is uploaded. FileFlip converts LWO files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What LWO to FBX actually does to the file#
Converting LWO to FBX runs on Assimp, downloads 11.2 MB of WebAssembly the first time and nothing after that, rebuilds the file in the target's own model.
| Engine | Assimp |
|---|---|
| Conversion path | One step: LWO → FBX |
| Downloaded to your browser | 11.2 MB, once, then cached by your browser |
| Quality | Rebuilt in the target's model |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Materials | Sometimes | Survives for some files and not others. |
| Textures | Sometimes | Survives for some files and not others. |
| Skeleton and animation | Sometimes | Survives for some files and not others. |
What is an LWO file?#
An LWO file stores a single 3D object for NewTek LightWave, its points, polygons and LightWave surface (material) definitions laid out as IFF chunks, the same tagged-chunk scheme Commodore designed for the Amiga.
Keep an object as LWO while it's staying inside a LightWave scene, since that's the format LightWave's own surfacing model round-trips without loss.
Convert LWO to OBJ or FBX once the object needs to leave LightWave for an engine or another modeller that doesn't ship an LWO importer.
What is an FBX file?#
An FBX file is Autodesk's proprietary binary or ASCII scene format, originally built by Kaydara for its Filmbox motion-capture software in 1996, that carries a full scene, meshes, materials, skeletons, skinning and animation together in one container.
Use FBX when a full rigged, animated scene needs to move between a DCC tool and a game engine, since almost every pipeline tool expects it.
Convert an FBX file when the destination needs an open, patent-unencumbered format, or when the application that wrote it isn't the one reading it and something is coming through wrong.
LWO to FBX questions people ask#
What is an LWO file?
An LWO file is a LightWave Object: the points, polygons and surface (material) definitions of a single 3D object, built on the IFF chunk format NewTek carried over from its Amiga roots. LightWave scenes reference LWO files by name rather than embedding the geometry, so a scene and its objects usually travel together.
What's the difference between LWO and LWS files?
An LWO file holds one object's geometry and surfacing; an LWS file is the LightWave scene that loads one or more LWO objects and adds the camera, lights, hierarchy and animation around them. Neither file is useful alone if the other half is missing.
What opens an LWO file?
LightWave 3D, the application LWO was built for, opens it natively on Windows and macOS. A handful of other 3D applications include an LWO importer, but support varies by whether that importer was updated to handle the newer LWO2 chunk layout introduced in LightWave 6.0.
What software opens FBX files?
Blender, Autodesk Maya, 3ds Max, Unity and Unreal Engine all open FBX files, since it's the format most 3D and game pipelines use to move scenes between tools. Which application wrote the file matters more than which one is opening it, because FBX exporters don't all interpret the format identically.