GLTF → GLB: bundle scattered assets into one file.
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GLTF models often ship as multiple files: separate JSON, BIN buffers, and textures. Each one triggers a separate network request when loaded in a browser, which slows things down. This converter merges those scattered assets into a single GLB file. Everything lives in one compact package, so deployment is simpler and pages load faster, making GLB a natural fit for CDN delivery and WebGL applications.
DefaultY-up
Determines the 'up' axis of the exported model. Different 3D software uses different conventions. Selecting the wrong system may cause the model to lie on its side.
Convention used by OpenGL, Three.js, and most Web 3D engines. Choose this for models from web or game engines.
Convention used by Blender (default), 3ds Max, and some CAD software. Try this if the model appears sideways.
Default0°
Range-180° – 180°
Rotate the model around the X axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Y axis (degrees). Useful for correcting axis misalignment or print orientation.
Default0°
Range-180° – 180°
Rotate the model around the Z axis (degrees). Useful for correcting axis misalignment or print orientation.
DefaultRoot node transform
Choose how rotation is written to the exported model. Baking into vertices rewrites all vertex coordinates so every export format (including geometry-only formats such as STL and STEP) applies it consistently; root node transform keeps the original vertex coordinates, which is friendlier to animated or skinned models, but formats that ignore node transforms (such as STEP) won't apply the rotation.
Rotation is written into all vertex coordinates and applies consistently to every export format; geometry data is rewritten.
Rotation is written as a root node transform while vertex coordinates stay unchanged; better for skinned or animated models, but formats that ignore node transforms (such as STEP) won't apply it.
Drag in the GLTF file. Multi-file models with .bin and textures are supported, and you can upload them as a ZIP archive.
Check the model before converting: textures and materials should be loaded, and missing resources appear as gray surfaces.
Convert and download a single GLB file with all resources merged into one request, ready for CDN and web delivery.
The file size is usually about the same as the original GLTF. Because all assets are combined into one file, loading requires only a single request, so the perceived loading speed is clearly faster.
No. The GLB already contains all of the original GLTF data, so the source files can be archived or deleted. If you later need to edit individual assets, unpack the GLB with a GLB-to-GLTF converter.
Yes. Standard material extensions such as metallic roughness and transmission are kept in the GLB. Custom or non-standard effects may not display correctly in every viewer.
GLTF can reference several .bin files for mesh and animation data. During conversion all .bin content is merged into the single GLB file, so you no longer have to manage separate assets.
If every asset is already inlined, converting makes little practical difference: GLB is essentially the same glTF content wrapped in a binary container. The conversion is most valuable when the model is split across many files, since GLB bundles everything into one compact package.
Yes. With all content in one file, a GLB requires only one request and has no relative paths that can break, which makes it a reliable option for CDN delivery and web distribution.
Take a 50MB PBR model through the full pipeline—Blender export, vertex compression, KTX2 texture conversion, engine loading—and get it under 5MB. Includes a complete automation script and a series cheat sheet.
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Desktop, mobile, VR, mini-programs—which compression combination should you use? This article consolidates the knowledge from the previous four articles into a decision matrix and an automation script—just follow it.
