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3D file formats

Every format we open and write, with what each can store. All conversions run in your browser.

STL

STL is the plain triangle-mesh format that nearly every slicer accepts: no colour, no units, just surface geometry.

STL viewer 👁STL → 3MF →STL → OBJ →STL → GLB →STL → GLTF →STL → PLY →STL → STEP →STL → STP →STL → AMF →STL → USDZ →STL → OFF →

3MF

3MF is a ZIP of XML files from the 3MF Consortium that keeps units, colours and multiple parts, and slicer projects build on top of it.

3MF viewer 👁3MF → STL →3MF → OBJ →3MF → GLB →3MF → GLTF →3MF → PLY →3MF → STEP →3MF → STP →3MF → AMF →3MF → USDZ →3MF → OFF →

OBJ

OBJ is a long-lived text mesh format with UVs and materials in a companion MTL file, supported by almost every 3D tool.

OBJ viewer 👁OBJ → STL →OBJ → 3MF →OBJ → GLB →OBJ → GLTF →OBJ → PLY →OBJ → STEP →OBJ → STP →OBJ → AMF →OBJ → USDZ →OBJ → OFF →

GLB

GLB is the single-file binary form of glTF, the Khronos web and real-time 3D standard, using metres and Y-up.

GLB viewer 👁GLB → STL →GLB → 3MF →GLB → OBJ →GLB → GLTF →GLB → PLY →GLB → STEP →GLB → STP →GLB → AMF →GLB → USDZ →GLB → OFF →

glTF

glTF 2.0 is the Khronos open standard for runtime 3D: a JSON scene plus binary buffers and image files, in metres with +Y up.

glTF viewer 👁glTF → STL →glTF → 3MF →glTF → OBJ →glTF → GLB →glTF → PLY →glTF → STEP →glTF → AMF →glTF → USDZ →glTF → OFF →

FBX

FBX is Autodesk's proprietary interchange format for meshes, rigs and animation, used heavily in games and film, usually in centimetres.

FBX viewer 👁FBX → STL →FBX → 3MF →FBX → OBJ →FBX → GLB →FBX → GLTF →FBX → PLY →FBX → STEP →FBX → AMF →FBX → USDZ →FBX → OFF →

PLY

PLY is a flexible ASCII or binary format from Stanford that stores vertices, faces and per-vertex colour, common in 3D scanning.

PLY viewer 👁PLY → STL →PLY → 3MF →PLY → OBJ →PLY → GLB →PLY → GLTF →PLY → STEP →PLY → AMF →PLY → USDZ →PLY → OFF →

DAE (Collada)

DAE is the COLLADA XML interchange format from Khronos, holding meshes, materials, scene graphs and animation, mostly seen in older pipelines.

DAE (Collada) viewer 👁DAE → STL →DAE → 3MF →DAE → OBJ →DAE → GLB →DAE → GLTF →DAE → PLY →DAE → STEP →DAE → AMF →DAE → USDZ →DAE → OFF →

STEP

STEP is the ISO 10303 CAD exchange format that stores exact B-rep solids and assemblies, so engineering models move between systems without being meshed.

STEP viewer 👁STEP → STL →STEP → 3MF →STEP → OBJ →STEP → GLB →STEP → GLTF →STEP → PLY →STEP → AMF →STEP → USDZ →STEP → OFF →

IGES

IGES is an older neutral CAD format for curves and surfaces, still found in legacy engineering archives and CAM workflows.

IGES viewer 👁IGES → STL →IGES → 3MF →IGES → OBJ →IGES → GLB →IGES → GLTF →IGES → PLY →IGES → STEP →IGES → AMF →IGES → USDZ →

AMF

AMF is an XML format standardised as ISO/ASTM 52915 to improve on STL with units, colours, materials and curved patches, but few tools adopted it.

AMF → STL →AMF → 3MF →AMF → OBJ →AMF → GLB →AMF → GLTF →AMF → PLY →AMF → STEP →AMF → USDZ →

3DS

3DS is the legacy binary mesh format of Autodesk 3D Studio DOS, limited to 65,535 vertices per mesh and 8.3 file names, still seen in old model libraries.

3DS → STL →3DS → 3MF →3DS → OBJ →3DS → GLB →3DS → GLTF →3DS → PLY →3DS → STEP →3DS → AMF →3DS → USDZ →

VRML (WRL)

VRML is the 1990s web 3D text format, .wrl, which stores scenes with shapes, colours and textures and still appears in older scans and X3D archives.

VRML → STL →VRML → 3MF →VRML → OBJ →VRML → GLB →VRML → GLTF →VRML → PLY →VRML → STEP →VRML → AMF →VRML → USDZ →

G-code

G-code is the list of machine commands a slicer writes for a specific printer: toolpaths and temperatures, not a 3D model.

G-code viewer 👁G-code → STL →G-code → 3MF →G-code → OBJ →

USDZ

USDZ is Apple and Pixar's uncompressed ZIP package of USD scene data, used for AR Quick Look on iPhone, iPad and Vision Pro.

OFF

OFF is a minimal text mesh format from the Geomview project, listing vertices and polygon faces, popular in geometry research and datasets.

OFF → STL →OFF → 3MF →OFF → OBJ →OFF → GLB →OFF → GLTF →OFF → PLY →OFF → STEP →OFF → AMF →OFF → USDZ →