GLB Converter
FileFlip converts GLB files into 13 other formats entirely inside your browser, using Assimp compiled to WebAssembly. The GLB file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert a GLB file?#
- Drop your GLB file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert GLB files online?#
Yes, because nothing is uploaded. FileFlip converts GLB files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a GLB file#
FileFlip converts GLB into 13 formats with Assimp, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | 3D Models |
|---|---|
| File extension | .glb |
| FileFlip support | Read and written |
| Conversions available | 13 |
| Engines | Assimp |
| Downloaded to your browser | 11.2 MB on the first conversion, then cached |
What is a GLB file?#
A GLB file is glTF's binary packaging, developed by the Khronos Group, wrapping the JSON scene description together with its geometry buffers and textures into one self-contained file instead of a JSON document with separate buffer and image files beside it.
Use GLB whenever a model has to be handed to a web viewer, AR app or game engine as a single upload.
Convert GLB back to glTF's JSON form only when something inside the file needs to be read or edited directly.
The GLB file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
GLB questions people ask#
Can I open a GLB file directly on my phone?
Android's Scene Viewer opens a GLB file straight into an AR view without a separate app, since it's built to consume glTF's binary form directly. iOS's AR Quick Look expects USDZ instead, so a GLB usually needs converting first to view in AR on an iPhone.
What does GLB stand for?
GLB is short for binary glTF, the single-file packaging of the glTF format. It isn't a separate format from glTF, just the same JSON scene, buffers and textures bundled into one container.
Why is GLB smaller than glTF?
A .gltf file stores its binary buffer data as base64 text embedded in JSON when it isn't split into separate .bin files, which inflates size by roughly a third. GLB stores that same data as raw binary bytes in its own chunk, so it avoids that text-encoding overhead entirely.
Do GLB and glTF look the same when rendered?
Yes, GLB and glTF describe the identical data model, meshes, materials, animations and scene graph, so a compliant viewer renders them the same way. The only difference is packaging: one file versus a JSON document with separate buffers and textures.