Convert 3D model files between STL, OBJ, GLB, GLTF, and PLY formats — 100% free, runs entirely in your browser.
| Format | Type | Best For | Import | Export |
|---|---|---|---|---|
| STL | Mesh | 3D Printing, CNC | ||
| OBJ | Mesh | General 3D, textures | ||
| GLB | Binary glTF | Web, AR/VR, games | ||
| GLTF | JSON glTF | Web, AR/VR, games | ||
| PLY | Mesh | 3D scanning, point clouds |
STL is the most widely used format for 3D printing. Nearly every slicer (Cura, PrusaSlicer, Bambu Studio, etc.) accepts STL files. It stores only geometry — no color or texture. If you're printing, this is usually what you want.
OBJ files can include vertex colors, texture coordinates, and normals. Great for sharing models that need material information or for use in 3D rendering software like Blender.
glTF is the "JPEG of 3D." GLB is the binary (single-file) version. These are ideal for web viewers, AR experiences, games, and social media 3D posts. If you're publishing a model online, use GLB.
PLY is commonly output by 3D scanners and photogrammetry software. It supports vertex colors and is useful for scientific and scanning applications.
Convert STL to OBJ when you need material support or plan to texture your model in software like Blender, Maya, or 3ds Max. OBJ files preserve UV coordinates and can reference external material (.mtl) files, making them more flexible than STL for rendering and animation.
Convert STL to GLB to make your 3D prints viewable on the web, in AR experiences, and on social media. GLB is the standard format for embedding 3D models in websites, and it works natively with iOS AR Quick Look and Android Scene Viewer.
Convert OBJ to STL when preparing a model for 3D printing. Most slicers — including Cura, PrusaSlicer, and Bambu Studio — work best with STL files. This conversion strips textures and materials, keeping only the mesh geometry your printer needs.
Convert GLB to STL to take a web or AR model and prepare it for 3D printing. This is common when downloading models from online 3D galleries, Sketchfab, or AI generators that output in glTF/GLB format.
Convert OBJ to GLB for web deployment, AR, or game engines. GLB is a compact binary format that loads faster than OBJ in browsers and supports PBR materials out of the box.
Convert GLB to OBJ for use in traditional 3D software like Blender, ZBrush, or Meshmixer. OBJ is one of the most universally supported formats across all 3D applications.
Convert GLTF to STL to prepare glTF scene files for 3D printing. GLTF (the JSON-based version of GLB) is common in web applications and needs to be converted to STL before slicing.
Convert STL to GLTF when you need a text-based, inspectable 3D format for web development. GLTF is ideal for Three.js, Babylon.js, and other WebGL frameworks.
Convert PLY to STL to 3D print scanned objects. PLY files from 3D scanners and photogrammetry software (like Meshroom or RealityCapture) often need conversion to STL before they can be sliced and printed.
Convert STL to PLY for use in scientific visualization, point cloud processing, or 3D scanning workflows. PLY supports vertex colors and custom properties not available in STL.
Convert PLY to OBJ to bring 3D scan data into modeling software. OBJ is widely supported and makes it easy to edit, retopologize, or texture scanned meshes in Blender or similar tools.
Convert PLY to GLB to publish 3D scans on the web. GLB is compact, fast-loading, and works in all modern browsers — perfect for showcasing photogrammetry results online.
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