B3D to X3D Converter
FileFlip converts B3D to X3D entirely inside your browser, using Assimp compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a B3D file to X3D?#
- Drop your B3D file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to X3D and the conversion starts on its own. FileFlip downloads 11.2 MB of WebAssembly the first time and nothing after that, then runs Assimp on your own machine.
- Save the X3D file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting B3D to X3D lose quality?#
Not in the sense of pixels or samples. Converting B3D to X3D rebuilds the file in X3D's own model rather than re-encoding it, so everything X3D can represent comes through exactly and anything it cannot has to be dropped. Expect the geometry to be exact, and anything the target has no place for, such as a rig, to be left behind.
Is it safe to convert B3D files online?#
Yes, because nothing is uploaded. FileFlip converts B3D 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 B3D to X3D actually does to the file#
Converting B3D to X3D runs on Assimp, downloads 11.2 MB of WebAssembly the first time and nothing after that, rebuilds the file in the target's own model.
| Engine | Assimp |
|---|---|
| Conversion path | One step: B3D → X3D |
| Downloaded to your browser | 11.2 MB, once, then cached by your browser |
| Quality | Rebuilt in the target's model |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Materials | Sometimes | Survives for some files and not others. |
| Textures | Sometimes | Survives for some files and not others. |
| Skeleton and animation | Sometimes | Survives for some files and not others. |
What is a B3D file?#
A B3D file is the binary chunk-based model format of Blitz3D, storing meshes, textures, materials, a bone hierarchy and keyframe animation for games written in that BASIC-derived language.
Use B3D when working directly in Blitz3D or maintaining an existing Blitz3D game's asset pipeline.
Convert B3D to glTF or FBX to bring a rigged, animated model into a modern engine, since Blitz3D itself hasn't been actively developed in years.
What is an X3D file?#
An X3D file holds a 3D scene in the XML encoding of the ISO X3D standard, describing geometry, materials, animation and interactive behaviour for playback in a compliant browser or viewer.
Use X3D for scenes that need standards-track archival stability, or when a project already runs on X3D-based simulation or visualisation tools.
Convert X3D to glTF or GLB for anything shipping to a modern web page, game engine or AR viewer.
B3D to X3D questions people ask#
What is a B3D file?
A B3D file is a 3D model in Blitz3D's native binary format, storing a mesh along with its textures, materials, bone hierarchy and keyframe animation. Blitz3D was a BASIC-derived language and engine popular for small, hobbyist games in the early 2000s.
Does a B3D file support animated characters?
Yes. A B3D file can store a full bone hierarchy with vertex weights and keyframed position, scale and rotation data, which is more than many game formats from the same era managed.
What software opens B3D files?
Blitz3D itself is the primary application, since the format was built specifically for it. Blitz3D and BlitzPlus were released as open-source software in 2014, which is why later third-party tools have been able to add B3D support.
What replaced VRML?
X3D replaced VRML, carrying the same kind of web-delivered interactive 3D scene forward as an ISO standard first approved in 2004, with an XML-based encoding in place of VRML's plain-text syntax.