Free Online U3D to STL Converter

Please note: Your U3D file, once uploaded to our server will be deleted 1 hour after upload so please download your converted U3D file before this time.

How to Convert your U3D to STL Online?

Here are 2 simple steps to convert your U3D to STL using our fast and free U3D converter tool.

Upload your U3D file

Upload your U3D file

Click the "Upload a U3D File" button, then select a U3D to upload. The maximum file size is 100MB.

Download your STL

Download your STL

Click the download link to receive your STL file.

File format information for U3D and STL

ExtensionU3D
Full NameUniversal 3D
Type3D Model
Mime Typemodel/u3d
FormatBinary

The U3D file is a 3D file format (Universal 3D) developed by a consortium of well known companies in 2005 with the idea of creating a standardized file format for storing 3D data including mesh vertices, textures, bones and effects.

U3D files are binary in nature containing a block based structure which following later revisions could be extended with custom blocks.

U3D Converter Capabilities

Our U3D 3D Model/Mesh tool does not support any color material data contained within U3D files so the converted file will not contain any color information.

ExtensionSTL
Full NameStandard Triangle Language
Type3D Model
Mime Typeapplication/vnd.ms-pki.stl
FormatText
Opens WithBlender, MeshLab, CAD Assistant, DAZ Studio

The STL file format has its roots in the 1980's and is the native file format for 3D Systems stereolithography CAD software. The format defines a triangulated mesh with vertices and faces and is a popular format for sharing 3D printable model files.

There were several formats that attempted to extend the STL format namely SolidView and VisCAM whose formats included limited 15-bit color information for each mesh face which is often ignored by most modern 3D software. The STL format can be either Text or Binary, our tools will support both formats.

STL Converter Capabilities

Our 3D conversion tool does not support color/material information in STL files so your file will not contain any color information.

Information for converting from U3D to STL

Your U3D file will be converted to a STL file using our unified 3D model and mesh conversion tool. Our U3D 3D tool performs accurate conversions of 3D elements such as vertices, faces, normals and relevant material information. Our tool will not attempt to transfer any color information if present in your U3D file, your final 3D model will contain geometry data only.

Frequently Asked Questions

How can I convert my U3D file to STL?

First click the "Upload..." button, select your U3D file to upload. Your U3D file will be uploaded to our servers. When the U3D to STL conversion has completed, you can download your STL file straight away.

How long does it take to convert my U3D to STL?

We aim to process all U3D to STL conversions as quickly as possible, this usually takes around 5 seconds however this can be longer for certain files, so please be patient.

How accurate is the U3D to STL conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development with new features being added every week.