Download and install the latest version of Filestar.
Right click on one or more X3d file(s) on your desktop and select Convert with Filestar.
Type convert to fbx in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.x3d -c "convert to fbx" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
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.x3dContract.x3d
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert X3D to FBX
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the X3D files in my Downloads folder to FBX”
Or run it yourself:
filestarcli -i file.x3d -c "convert to fbx"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent convert X3D to FBX?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.x3d -c "convert to fbx" on your computer, so your files stay on it.
X3D (Extensible 3D) is a royalty-free open standard file format used to represent 3D computer graphics. It is used to store and interchange 3D model data, including surface geometry, color, animation, and metadata. X3D files are built on the XML standard, and can be viewed and edited with a variety of 3D modeling programs.
FBX, FilmBox, is a popular 3D file format that was originally developed by Kaydara for MotionBuilder. It was acquired by Autodesk Inc in 2006 and is now one of the main 3D exchange formats as used by many 3D tools.
