What does OBJ stand for?

OBJ stands for Object file — it was developed by Wavefront Technologies in the 1980s for their PowerAnimator software (the predecessor to Maya). The format stores 3D geometry as plain text: vertices, texture coordinates, normals, and faces. Material definitions live in a separate .mtl file referenced by the .obj.

Does OBJ support animation?

No. OBJ has no fields for skeletons, skin weights, blend shapes, or keyframes. It is a static geometry format. To carry animation, use FBX, GLB, or GLTF — all of which support full rigging and keyframed animation natively.

What is the .mtl file?

MTL (Material Template Library) is OBJ's companion format. It defines materials referenced by the .obj file — diffuse color, specular color, texture map paths, and basic shading parameters. When you ship an OBJ model, always include the .mtl and any texture images, or the model renders without materials.

Can I edit OBJ files by hand?

Yes — OBJ and MTL are plain text. Open either in any text editor to inspect or modify vertices, faces, materials, or texture references. This makes OBJ popular for scripting, automated mesh processing, and quick tweaks without firing up a DCC tool.

Is OBJ still relevant in 2026?

Yes, for compatibility. Every 3D tool ever shipped reads OBJ, which makes it the lowest-common-denominator interchange format. For new work, prefer GLB/GLTF for web and game engines, STL for 3D printing, and FBX or GLB for animation. But OBJ remains the safest choice when you do not know what tool will receive your model.

Free OBJ Converter

Lightning-fast OBJ conversion — 100% in your browser. Your files never leave your device. Free, no watermark, no sign-up.

Upload 3D Model

Drag and drop or click to upload. Files are processed locally in your browser.

Click or drag to upload

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

GLBGLTFOBJSTLFBXPLY

3D Preview

No model loaded

Upload a 3D model to preview and convert it

Fast3D AI

No OBJ file? Generate one with AI.

Skip the search — generate a model from text or an image, then convert it to OBJ or any other format in one workflow.

Generate → convert — all on fast3d.org.

Text to 3D Image to 3D

Convert OBJ to other formats

Pick a target format to convert your OBJ files into.

GLB

OBJ → GLB

Binary glTF, the most common modern 3D format

GLTF

OBJ → GLTF

JSON-based glTF, human-readable

STL

OBJ → STL

Stereolithography, the standard for 3D printing

PLY

OBJ → PLY

Polygon File Format, common in 3D scanning

Convert other formats to OBJ

Convert from another 3D format into OBJ.

GLB

GLB → OBJ

Binary glTF, the most common modern 3D format

GLTF

GLTF → OBJ

JSON-based glTF, human-readable

STL

STL → OBJ

Stereolithography, the standard for 3D printing

FBX

FBX → OBJ

Autodesk FBX, popular in animation pipelines (input only)

PLY

PLY → OBJ

Polygon File Format, common in 3D scanning

What OBJ supports

Feature	OBJ
Geometry
Textures
Materials
Animation
Rigging

When to use OBJ

Universal interchange

When you need a model to import into an unknown or legacy tool, OBJ is the safest bet. Every DCC tool, CAD package, and slicer reads it.

CAD and engineering handoff

Solidworks, Fusion 360, and Rhino accept OBJ as a mesh reference. Newer formats like GLB are rarely supported in CAD.

Sculpting and retopology

ZBrush, 3D-Coat, and Meshmixer prefer OBJ for sculpting and remeshing workflows.

Plain-text editability

OBJ is plain text — you can edit vertices, materials, and object structure in any text editor or via script.

Common OBJ workflows

Workflow 1

Sculpting in ZBrush

Import OBJ, sculpt the high-resolution detail, run ZRemesher for retopology, then export as OBJ for the next pipeline stage.

Workflow 2

CAD mesh reference

Import OBJ as a visual reference in Solidworks or Fusion 360. Useful for matching 3D-scan data to engineering models.

Workflow 3

Convert to modern formats

Use Fast3D to convert OBJ to GLB for web delivery, STL for 3D printing, or PLY for scanning workflows.

OBJ software compatibility

Software	Support	Notes
Blender	Read + Write	Native OBJ import/export with MTL material support.
Maya / 3ds Max	Read + Write	Native OBJ support — the format was originally designed for Maya.
ZBrush	Read + Write	Preferred format for ZBrush sculpting and retopology workflows.
Unity / Unreal	Read	OBJ imports as static mesh without materials or textures in most cases.
CAD (Solidworks, Fusion 360)	Read	Imports OBJ as mesh reference. Export to OBJ is less common.
3D printing slicers	Limited	Most slicers read OBJ but STL is the standard for 3D printing.

About OBJ

OBJ is one of the oldest and most universally supported 3D formats. It stores geometry as plain text alongside an MTL file for basic materials and texture references. It does not support animation or rigging, but its simplicity makes it a lingua franca between DCC tools, CAD, and 3D-printing slicers.

← 3D Converter

OBJ