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Free Online GLB Optimizer & Compressor

Compress GLB Files & Reduce GLB File Size Online

Free online GLB compressor and optimizer to reduce GLB file size. Upload your GLB and get a compressed, optimized file in seconds. Also converts FBX to GLB, STEP to GLB, USDZ to GLB, OBJ, and IGES with automatic KTX2 texture compression, mesh simplification, and draw call reduction.

Use as a GLB size reducer for Shopify and e-commerce product viewers, AR furniture visualization, mobile game assets, CAD to GLB workflows, or Meta Quest VR. No account required.

Developed by RAUM virtual collaboration — the enterprise VR platform for spatial collaboration. Upload optimized files directly to your workspace at manage.raum.app.

Feature Roadmap


RAUM file upload limits (details): Symbols 400KB · Models 8MB · Scenes 20MB
Found an issue? Email bug@raum.app with a description and a link to the 3D file.

Frequently Asked Questions

Standard 3D files are often too large and resource-heavy for VR headsets like Meta Quest. Without optimization, you'll experience long loading times, stuttering, and poor performance. Our GLB Optimizer converts your files into a VR-friendly format that loads up to 5x faster, runs smoothly without lag, and uses significantly less memory - giving your users a better experience. Read our VR/AR optimization guide for detailed best practices.

Simply upload your FBX file using the converter above. RAUM automatically optimizes textures, reduces mesh complexity, and ensures compatibility with Meta Quest 2 and Quest 3 memory limits (20MB per scene). The conversion typically takes 30-60 seconds depending on file complexity.

Yes! RAUM Converter supports STEP (.stp, .step) and IFC formats commonly used in architectural and engineering workflows. This is perfect for BIM-to-VR workflows, architectural visualization, and product design reviews. The converter preserves materials and maintains geometric accuracy. Learn more in our CAD to Realtime GLB guide.

Yes, RAUM Converter is completely free for public use with no account registration required. You can convert unlimited files. RAUM users can integrate optimized models into RAUM's VR collaboration platform for team collaboration and project management.

Upload your GLB file to this free online GLB compressor. RAUM automatically applies meshoptimizer compression, converts textures to KTX2 format, and reduces draw calls. Most files see a 60-90% size reduction. No software installation or account required — just drag and drop your file above.

To reduce GLB file size, upload your file to our free GLB size reducer above. The tool compresses textures to KTX2 (BasisU), applies mesh simplification, and strips unnecessary metadata. You can choose presets from Normal to Preview quality depending on how much you want to reduce the file. For manual tips, check our GLB optimization guide.

Upload your STEP (.step or .stp) file to this free STEP to GLB converter. RAUM converts CAD geometry to optimized GLB format, preserving materials and structure. The output is ready for web viewers, Shopify, AR, and VR platforms. Learn more in our CAD to GLB guide.

For optimal performance on Meta Quest, individual models should be under 8MB, with scenes staying below 20MB.

Yes! RAUM Converter preserves all materials, textures, and PBR properties from your source files. We convert textures to KTX2 format for optimal file size and VR performance, while maintaining visual quality.

RAUM uses industry-standard optimization including: Meshoptimizer compression (EXT_meshopt_compression) for reduced file sizes, texture format conversion to KTX2 with BasisU compression for memory efficiency, mesh instancing (EXT_mesh_gpu_instancing) to reduce draw calls, and vertex/mesh cache optimization to improve GPU rendering performance on VR headsets.
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