Which is better for Unity or Unreal, FBX or OBJ?

FBX for anything rigged or animated - it's what both engines' pipelines are built around. For static meshes either works; many developers still prefer FBX for consistency, but OBJ imports fine and GLB is the rising alternative.

Does converting FBX to OBJ keep animations?

No - OBJ cannot store animation, so the mesh exports in rest pose with transforms baked. If you need the animation, stay in FBX or use glTF/GLB.

Why do FBX files sometimes import at the wrong scale?

FBX stores unit metadata that different exporters set differently (Blender's cm-vs-m convention is the classic culprit), producing the notorious 100x scale factor. OBJ sidesteps this by having no units at all - what you see is raw coordinates.

Can OBJ store textures like FBX can?

Not inside the file - OBJ references external images via its .mtl. FBX can embed textures in the binary itself, making it self-contained at the cost of file size.

Is FBX or OBJ better for 3D printing?

Neither is the printing standard (that's STL/3MF), but between the two, OBJ - slicers read it directly and the rig/animation features of FBX are dead weight to a printer.

FBX vs OBJ: What's the Difference and When Does Each Win?

FBX carries full scenes - rigs, skeletal animation, cameras, lights, embedded textures - and is the de facto standard for moving characters into Unity and Unreal. OBJ carries static geometry with UVs and material references, nothing more, and its plain-text simplicity makes it the most reliable static-mesh exchange format ever shipped. Animated or rigged content: FBX, no contest. Static props, scans, and printable models: OBJ keeps life simple.

FBX for anything that moves, OBJ for anything that doesn't.

Updated July 2026

.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

.obj

OBJ (Wavefront Object)

OBJ is the plain-text workhorse of 3D interchange. It stores vertices, faces, UV coordinates, and normals in a human-readable file, with materials referenced from a companion .mtl file. Practically every 3D application of the last 30 years can read it.

Since: circa 1990 - Wavefront Technologies
Used by: Blender, Maya, 3ds Max, ZBrush, game engines, 3D scanners

FBX vs OBJ: side by side

A check marks the stronger format for each dimension.

Dimension	FBX	OBJ
Rigs & skeletal animation	Full support - the industry pipeline standard	None
Scene structure	Hierarchies, transforms, cameras, lights	Flat named groups
Textures	Can embed images inside the file	External .mtl + image files (easily lost)
Openness	Proprietary Autodesk format, reverse-engineered by everyone else	Fully open, documented, trivially parseable text
Robustness across tools	Version quirks between exporters are a known pain	Opens identically everywhere since the 1990s
Game engine import	First-class in Unity and Unreal	Supported, but static only

Which should you use?

Rigged character into Unity or Unreal

FBX

Skeleton, skin weights, and animation clips travel inside the file - the entire game industry runs on this.

Static prop or environment piece

OBJ

No rig means FBX's complexity buys nothing; OBJ is simpler and never version-fights your importer.

Sending a model to unknown software

OBJ

Everything since the 90s opens OBJ. FBX support outside DCC/engines is spottier.

Archiving with textures guaranteed attached

FBX

Embedded textures make it self-contained; OBJ's sidecar files separate over time. (GLB does this even better.)

A scene format vs a mesh format

FBX (Autodesk's since 2006, originally FilmBox's) is a scene graph: object hierarchies with transforms, meshes with skin weights bound to skeletons, animation curves, blend shapes, cameras, lights, and optionally the texture images themselves embedded in the binary. OBJ is a mesh list: vertices, faces, UVs, normals, group names, material references. That one-sentence difference decides every real choice between them - if any part of your content is a rig, an animation, or a multi-object scene whose arrangement matters, OBJ physically cannot carry it.

The FBX tax: proprietary versioning

FBX's power comes with a recurring cost: it is a closed Autodesk format that every non-Autodesk tool supports through reverse engineering. Blender's exporter, Unity's importer, and assimp-based pipelines each speak slightly different dialects, and version mismatches (binary vs ASCII FBX, 2014 vs 2020 spec) produce the familiar flipped-normals, 100x-scale, or missing-animation bugs. OBJ has no versions and no dialects - the price of its simplicity is that there is nothing in it to get wrong. The modern industry answer to FBX's tax is glTF/GLB, which is open and increasingly first-class in engines.

Converting between them

FBX to OBJ flattens the scene: transforms bake in, rigs and animations drop (rest pose survives), and materials reduce to .mtl references. It's the standard way to get a game asset into mesh-only tools. OBJ to FBX wraps static geometry in an FBX container so engine pipelines that expect FBX accept it - nothing animates, but nothing needed to. Both directions run free in your browser here.

Convert between FBX and OBJ - free

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

FBX to OBJ converter OBJ to FBX converter

FBX vs OBJ - frequently asked questions

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