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Select a .glb file up to 50 MB.
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GLB to OBJ Converter
Turn your GLB 3D model into a Wavefront OBJ mesh for compatible modeling and mesh editing tools. Convert for free, right in your browser.
Convert GLB to OBJ
Free · No signup · Files stay in your browser
Upload a self-contained GLB up to 50 MB. Download a static OBJ mesh; materials, textures, and animations are not exported.
Need the reverse? Convert OBJ to GLB
Try designing LEGO models with AI
Start with a 3D object, an image, or a text prompt. BrickBuilder AI turns your ideas into LEGO-compatible designs you can preview and edit.
Start with a 3D object
Turn your GLB mesh into a LEGO-compatible brick model.
Try itStart with an image
Use a photo, sketch, or picture as your starting point.
Try itStart with a text prompt
Describe your idea and let AI design it in bricks.
Try itReady to build in bricks? Try GLB to LEGO with your 3D model.
Convert binary glTF to Wavefront OBJ
GLB bundles a glTF 2.0 scene into a binary file. If your mesh editing workflow expects .obj geometry, this converter extracts the static meshes from the default scene and writes their positions, normals, and UV coordinates into a Wavefront OBJ file. Object transforms are applied to the exported geometry.
OBJ has fewer scene features than GLB. This tool exports geometry without a companion MTL file, textures, colors, or animation tracks. For rigged or instanced assets, apply them to a static mesh in a 3D editor before converting. Keep your original GLB as the complete source asset.
Changing the file format does not generate LEGO bricks. To build from a GLB model, open the dedicated GLB to LEGO converter.
Convert to OBJ
Process the mesh locally in your browser.
Download your OBJ
Save the result and import it into a compatible app.
GLB to OBJ FAQ
How do I convert GLB to OBJ online?
Choose a .glb file, click Convert to OBJ, and download the result. The converter runs locally in your browser and accepts files up to 50 MB. No account or software installation is needed.
Is this GLB to OBJ converter free?
Yes. File format conversion is free and does not require signup. LEGO model generation is a separate tool with its own usage limits.
Are my 3D files uploaded to a server?
No. The converter reads and processes your model on your device. File contents and filenames are not sent to our servers. We record usage events such as conversion success and file size to improve the tool.
Does GLB to OBJ preserve materials and textures?
The OBJ download contains mesh geometry, normals, and UV coordinates. It does not include an MTL file, textures, material colors, or vertex colors. Keep the original GLB if you need its appearance, or export OBJ with materials from a full 3D editor.
Why convert a GLB model to OBJ?
OBJ is useful when a modeling, sculpting, or mesh editing tool accepts Wavefront geometry. GLB is designed to carry richer scene data in one binary file. Converting to OBJ gives you a static mesh for compatible editors, while animation and glTF material features remain in the original GLB.
Which models can I convert?
Use a self-contained, uncompressed GLB 2.0 file with static meshes, up to 50 MB and 2 million loaded vertices. External resources, compressed meshes or textures, skinning, instances, and shape keys need to be embedded, decompressed, or applied in a 3D editor first. Animation tracks are not exported.
Can I turn my 3D model into a LEGO design?
Yes. Open our GLB to LEGO tool to design a brick model from a 3D object. If your source file is OBJ, convert it to GLB first. You can also design LEGO-compatible models from images or text prompts. Use the links on this page to choose your starting point.