What does FBX stand for?

FBX stands for Filmbox — the original name of Kaydara's motion-capture software, which used the .fbx file format internally. Autodesk acquired Kaydara in 2006 and has owned the format since. The format itself is sometimes referred to as just 'Autodesk FBX'.

Is FBX open or proprietary?

Proprietary. FBX is owned by Autodesk. The format specification is published (Autodesk offers an FBX SDK), but the format itself is not open or community-governed. For an open alternative with the same feature set, use GLB or GLTF (glTF 2.0) — both support skeletons, skinning, and animation natively.

Why is FBX still the industry standard?

Inertia. Maya, 3ds Max, MotionBuilder, Unreal Engine, and Unity all support FBX deeply — it is the format every game-engine and animation pipeline has used for 20 years. Switching to GLB is happening (especially for web and AR), but for character animation between DCC tools, FBX remains the default.

Why does Fast3D not export FBX?

There is no robust open-source FBX exporter. Autodesk's FBX SDK is proprietary and not freely licensable. The reverse (reading FBX) is well-supported via libraries like FBX2glTF, but writing FBX reliably is not. Fast3D focuses on the formats that can be both read and written cleanly: GLB, GLTF, OBJ, STL, and PLY.

Can I convert FBX to GLB losslessly?

Largely yes. Both formats support the same core feature set — geometry, PBR materials, textures, skeletons, skin weights, and keyframed animation. FBX has some extras (Maya-specific constraints, custom attributes) that GLB has no equivalent for, but typical character rigs convert with ~95% fidelity. Always inspect the converted GLB in Blender or model-viewer to verify.

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Supports GLB, GLTF, OBJ, STL, FBX, PLY

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Convert FBX to other formats

Pick a target format to convert your FBX files into.

GLB

FBX → GLB

Binary glTF, the most common modern 3D format

GLTF

FBX → GLTF

JSON-based glTF, human-readable

OBJ

FBX → OBJ

Wavefront OBJ, widely supported geometry format

STL

FBX → STL

Stereolithography, the standard for 3D printing

PLY

FBX → PLY

Polygon File Format, common in 3D scanning

FBX is input-only — Fast3D can load it but cannot export it. Choose a target format above to convert your FBX file.

What FBX supports

Feature	FBX
Geometry
Textures
Materials
Animation
Rigging

When to use FBX

Animated character pipelines

FBX is the standard for moving rigged characters between Maya, Blender, Unreal, and Unity. Skeletons, skin weights, and animation clips survive the trip.

Motion-capture data

MoCap sessions typically deliver FBX files with baked animation. Import into Unreal or Unity for retargeting to your character rig.

Architectural visualization

Some ArchViz teams use FBX for moving scenes from 3ds Max to Unreal Engine. Materials and geometry transfer cleanly.

Convert to web formats

Use Fast3D to convert FBX assets to GLB for web display, OBJ for static mesh editing, or STL for 3D printing.

Common FBX workflows

Workflow 1

Maya → Unreal character pipeline

Rig and animate a character in Maya, export as FBX with embedded media, import into Unreal Engine for game development.

Workflow 2

FBX → GLB web conversion

Drop FBX assets into Fast3D to convert to GLB. Skeletons, animation, and textures survive — load the GLB in Three.js or model-viewer for web display.

Workflow 3

FBX → STL for 3D printing

Pose a rigged character in Blender, apply the pose as rest pose, export as FBX, then convert to STL for 3D printing.

FBX software compatibility

Software	Support	Notes
Autodesk Maya / 3ds Max	Read + Write	Native — Autodesk owns and develops the FBX format.
Blender	Read + Write	Native FBX importer and exporter. Occasional compatibility quirks with constraints and custom attributes.
Unity	Read	Native FBX import with full support for rigs, animation, and materials.
Unreal Engine	Read	Native FBX import — the standard format for getting assets into Unreal.
MotionBuilder	Read + Write	FBX is MotionBuilder's native format — animation cleanup and retargeting hub.
Web browsers	None	Browsers cannot load FBX. Convert to GLB for web display.

About FBX

FBX is Autodesk's proprietary format and the industry default for moving rigged, animated 3D characters between DCC tools like Maya, Blender, and Unreal Engine. It supports skeletons, blend shapes, and keyframed animation. Fast3D can load FBX for conversion into lighter web-friendly formats, but does not export FBX.

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