Viewers
Online 3D file viewer
Drop any supported 3D file to inspect it. Dimensions, volume and triangle count are calculated locally.
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- STL viewerSTL is the oldest and most widely supported 3D printing format. It stores nothing but a list of triangles, with no color, texture, unit or scale information. Every slicer and almost every 3D tool can read it, which is why it is still the default exchange format for printable models.
- 3MF viewer3MF is the modern replacement for STL, published by the 3MF Consortium (Microsoft, Autodesk, HP, Prusa and others). It is a ZIP archive containing XML that stores units, colors, materials, multiple objects and print settings. Slicers such as Bambu Studio and PrusaSlicer use it as their project format.
- OBJ viewerOBJ is a plain-text mesh format from Wavefront. It stores vertices, normals, UV texture coordinates and face definitions, and references materials through a companion .mtl file. It is human-readable and supported by virtually every 3D modelling application.
- GLB viewerGLB is the binary container for glTF 2.0, the "JPEG of 3D" maintained by the Khronos Group. A single .glb file bundles geometry, PBR materials, textures and animations, and is the standard format for 3D on the web and in AR viewers.
- glTF viewerglTF is the JSON form of the same Khronos standard as GLB. The .gltf file describes the scene as readable JSON; binary buffers and textures may be embedded as base64 or kept as separate files. It is convenient when you want to inspect or edit the scene description by hand.
- STEP viewerSTEP (ISO 10303, files ending in .step or .stp) is the neutral CAD exchange format. Unlike mesh formats it stores exact B-rep geometry: analytic surfaces, NURBS, edges and assembly structure with real units. Every CAD system can export STEP, and it is what you receive from suppliers, McMaster-Carr or GrabCAD.
- STP viewer.stp is simply the three-letter extension for a STEP file (ISO 10303-21). SolidWorks, Inventor and many Windows CAD tools default to .stp while others use .step; the content is identical. It stores exact B-rep solids with units, not triangles.
- PLY viewerPLY was designed at Stanford to store 3D scanner output. It supports per-vertex colors and arbitrary custom properties, in either ASCII or binary encoding, which is why scanning and photogrammetry software prefers it over STL.
- FBX viewerFBX is Autodesk's proprietary interchange format for animation and game assets. It carries meshes, rigs, animation, cameras and materials. Because it is closed and complex, FBX files are rarely accepted by 3D printing tools directly.
- DAE viewerCOLLADA (.dae) is an XML-based interchange format standardised by the Khronos Group in the 2000s. It was the default export of SketchUp and many older tools; today it has largely been replaced by glTF, but a lot of existing models are still distributed as .dae.
- G-code viewerG-code is not a model format but a list of machine instructions: move here, extrude this much, set this temperature. Slicers produce it from STL or 3MF files. It can be visualised as the toolpath the nozzle will follow, but it cannot be reliably converted back into a clean 3D model.
- IGES viewerIGES is the CAD exchange format that preceded STEP, dating back to 1980. It stores surfaces and curves rather than solids, so files often need stitching before they can be used. It is still common in tooling and older supplier archives.
- AMF viewerAMF is an XML format standardised as ISO/ASTM 52915 as an intended successor to STL. It supports units, colors, materials and curved triangles. Adoption stayed limited and most of the industry moved on to 3MF, but slicers still accept AMF files.
- VRML viewerVRML (.wrl) is a 1990s text format for 3D scenes on the web. It still shows up as the export format of older CAD systems and as the input format some full-color 3D printing services require, because it carries per-face colors.
- 3DS viewer3DS is the binary format of the original Autodesk 3D Studio from the DOS era. It is limited to 65,536 vertices per object and 8-character names, yet an enormous number of models from older libraries and marketplaces are still shipped as .3ds files.