Is GLB replacing FBX?

For delivery, distribution, web, and AR - largely yes; it's the open standard with all the momentum. Inside deep character-animation pipelines (mocap, retargeting, cinematics), FBX remains the standard and isn't going anywhere soon.

Which works in Unity and Unreal?

Both. FBX has been first-class forever; GLB imports via glTFast (Unity, now official) and Unreal's built-in glTF importer. For static and simply-animated assets the results are equivalent; complex rigs still flow more smoothly through FBX.

Do materials survive converting GLB to FBX?

Base colors and texture references translate, but FBX has no true PBR slots - roughness/metalness maps typically need reconnecting in the target tool. The geometry, UVs, and normals carry perfectly, so it's a five-minute fix, not a redo.

Why do AI 3D generators output GLB instead of FBX?

GLB is open (no licensing), self-contained (textures embedded), PBR-native (looks right everywhere), and web-displayable (instant previews). Every practical requirement of AI-generated asset delivery points at GLB - which is why our generator exports it, alongside FBX for pipeline compatibility.

Which format is better for AR?

GLB, decisively - Android's Scene Viewer consumes it directly, and iOS Quick Look uses USDZ, which converts cleanly from GLB (our converter does this in-browser). There is no practical FBX-to-AR path.

GLB vs FBX: Which 3D Format Should You Use?

GLB is the open, modern format: PBR materials that render identically everywhere, single self-contained file, native on the web and in AR - it's what AI generators and web viewers speak. FBX is the entrenched pipeline format: richer DCC-to-engine animation workflows and universal studio tooling, but proprietary and version-quirky. Rule of thumb - GLB for delivery and real-time use anywhere; FBX when a specific pipeline (Maya to Unreal cinematics, mocap retargeting) demands it.

GLB is the future and the web's present; FBX still owns deep animation pipelines.

Updated July 2026

.glb

GLB (Binary glTF)

GLB is the binary form of glTF, often called "the JPEG of 3D". One file packs the full scene: meshes, PBR materials, embedded textures, animations, and a real unit scale (meters). It is the standard for 3D on the web and the default output of most AI 3D generators.

Since: 2015 - Khronos Group
Used by: Web viewers, Three.js, Unity, Unreal, AR apps, e-commerce platforms

.fbx

FBX (Filmbox)

FBX is Autodesk's proprietary scene format and the long-standing standard for moving rigged, animated characters between DCC tools and game engines. Skeletons, skinning, blend shapes, and animation clips all travel inside one file.

Since: 2006 (Autodesk era) - Autodesk (proprietary)
Used by: Unity, Unreal Engine, Maya, 3ds Max, MotionBuilder

GLB vs FBX: side by side

A check marks the stronger format for each dimension.

Dimension	GLB	FBX
Openness	Open Khronos standard with a public spec	Proprietary Autodesk, reverse-engineered elsewhere
Materials	PBR (metallic-roughness) - consistent across renderers	Phong-era model plus vendor extensions - varies by tool
Web & AR	Native: model-viewer, three.js, converts cleanly to USDZ	Not web-usable without conversion
Animation depth	Skeletal + morph targets (solid, growing)	Deeper: constraints, custom curves, mocap ecosystems
Studio tooling maturity	Good and improving fast	Two decades of pipeline integration everywhere
File & versioning behavior	One binary, one spec version that behaves	Binary/ASCII variants, spec-year dialects, scale quirks

Which should you use?

Model for a website, configurator, or AR preview

GLB

It's the only one browsers speak natively - one file into model-viewer or three.js and you're live.

Character animation pipeline (Maya/MoBu to engine)

FBX

Retargeting, constraints, and the mocap ecosystem are built around FBX; glTF support there is still catching up.

Distributing assets to unknown buyers

GLB

PBR materials arrive looking right in any modern tool, and one file can't lose its textures.

Interop with older studio software

FBX

Legacy DCC versions predate glTF; FBX (or OBJ) is what they reliably read.

The generational hand-off

FBX became the industry's spine because for fifteen years nothing else could move rigged, animated content between Maya, 3ds Max, MotionBuilder, and the engines. glTF 2.0 (2017) was designed as the open replacement - 'the JPEG of 3D' - and GLB is its shipping form. The momentum is one-directional: every AI model generator outputs GLB, Google and Apple built AR delivery on it (directly and via USDZ), and Unity, Unreal, and Godot now import it natively or via first-party plugins. FBX isn't dying - deep animation pipelines still run on it - but it has stopped being the default answer.

Materials: where the difference bites hardest

GLB's PBR metallic-roughness materials are part of the spec, so a model looks the same in Blender, a browser, and Unreal. FBX predates PBR; its material model is Phong-era with vendor-specific extensions bolted on, which is why FBX assets so often arrive with materials that need manual rebuilding. If your asset's look matters and it travels between tools, this single difference usually decides the format.

Converting between them

GLB to FBX is the compatibility direction - getting modern (often AI-generated) assets into FBX-only pipelines and older tools. Geometry, UVs, and normals carry; PBR materials downgrade to FBX's model; our browser converter handles it free with no upload. FBX to GLB modernizes legacy assets for web and AR use - same carry-over, and the result drops straight into any glTF viewer.

Convert between GLB and FBX - free

Both directions run locally in your browser. No upload, no signup, no watermark.

GLB to FBX converter FBX to GLB converter

GLB vs FBX - frequently asked questions

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