X3DB 3D Model — A .x3db file is a X3DB 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.
Quick facts
What is .x3db
A .x3db file is a X3DB 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.
In the mime-db registry it maps to model/x3d+fastinfoset. When serving .x3db over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to model/x3d+fastinfoset — and is delivered over HTTP via the Content-Type header.
How to open .x3db files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: model/x3d+fastinfoset
Common software that reads/writes .x3db:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .x3db files
How to create .x3db files
Frequently asked questions
Common options include Blender, MeshLab, Autodesk Viewer. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .x3db extension.
model/x3d+fastinfoset is the media type identifier used for .x3db files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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