Our free and fast tool will convert most 3D mesh or 3MF (3D Manufacturing Format) model files to a standard OFF (Object File Format) file that can then be edited further in most popular 3D editing packages such as Blender or 3D printed without any further processing. Our conversion tool can also batch convert multiple 3MF files, up to 25 files at a time can be converted.
To convert your 3MF file click the Upload button above and select the file to convert. Once selected, the file will be converted to a OFF file and will ready for download shortly afterwards. For more information about the 3MF to OFF conversion process see the conversion information section below for more information.
Here are 2 simple steps to convert your 3MF to OFF.
First click the "Upload..." button, select your 3MF file to upload. Select any configuration options. When the 3MF to OFF conversion has completed, you can download your OFF file straight away.
We aim to process all 3MF to OFF conversions as quickly as possible, this usually takes around 5 seconds but can be more for larger more complex files so please be patient.
We aim to create the most accurate conversions with our tools. Our tools are under constant development with new features and improvements being added every week.
Yes, of course! We do not store the 3MF file you submit to us. The resulting OFF file, once created is deleted 15 minutes after upload and the download link will expire after this time.
Yes! Our 3MF to OFF tool will run on any system with a modern web browser. No specialist software is needed to run any of our conversion tools.
Yes. Although you can use an Ad Blocker, if you like our 3MF conversion tool please consider white-listing our site. When an Ad Blocker is enabled there are some conversion limits on some of our tools and processing/conversion times will be longer.
Yes! Our 3MF tool supports full batch conversions. You can upload up to 25 3MF files at a time. Our tool will convert them all as quickly as possible. Once completed, you can either download the OFF files individually or download them all in a single ZIP file.
Converting from the 3MF file format to OFF can be a complex process and any tool used for this conversion process needs to be able to handle a variety of data conversion tasks as well as identify any defects within the 3D model and fix them. Here we will explain the conversion process used by our tool to accurately convert your 3MF file to a valid OFF 3D model suitable for 3D printing. Lets start with the conversion process, which involves the following steps:
A 3MF file is a collection of 3D model data files including mesh and texture data compressed into a single file aimed at the 3D printing arena. The file is basically a ZIP file containing the relevant 3D files with the 3MF extension. The internal mesh structure is stored within various XML files making this easy to read in using a standard XML parser.
Our tool can read the compressed 3MF file and parse the 3D model contents taking into account all vertex, face and material information. As the 3MF format supports nested models within the 3D scene our tool will check for these and perform any world space transforms that are needed.
When our tool reads in this 3D data all we are interested in are the vertices, faces and normals as this is the only data that can be accurately converted into the final OFF file.
The 3MF file can contain other data such as material definitions and textures that describe how a particular set of 3D geometry should be rendered. As we are creating an OFF file, which does not support materials and textures, we will be ignoring this data if it is present in the 3MF file.
With the 3MF file data read, our tool generates an internal representation of the full 3D model and will attempt to fix any geometry issues encountered. Along with repairing any issues with the 3D model, the tool will remove any duplicated vertices and prepare the model ready for exporting to the OFF format.
With the conversion process entering its final stages, our tool now needs to take the in-memory 3D model we have created in step 2 and convert this to the OFF format.
| Extension | 3MF |
| Full Name | 3D Manufacturing Format |
| Type | 3D Model |
| Mime Type | application/vnd.ms-package.3dmanufacturing-3dmodel+xml |
| Format | Binary |
| Tools | 3MF Converters, 3D Model Voxelizer, Create 3MF Animation, Text to 3MF, View 3MF |
3MF files are a modern 3D file format designed specifically for use with 3D printable models (additive manufacturing). It was designed to be the successor to the popular legacy STL format (also a common format in 3D printing) to overcome the limitations of that format.
The format of 3MF files is XML based that are compressed with the standard Zip file compression resulting in small, easily transferable files. The format supports 3D meshes along with associated materials and textures all contained within the Zip file.
If your 3MF file contains textures, these will be included in the conversion process. If a material contains color information this will be translated where possible.
| Extension | OFF |
| Full Name | Object File Format |
| Type | 3D Model |
| Mime Type | text/plain |
| Format | Text |
| Tools | OFF Converters, 3D Model Voxelizer, Create OFF Animation, Text to OFF, View OFF |
| Open With | MeshLab, CAD Assistant |
The OFF file format is a simple text-based format capable of storing 2D and 3D geometry and was originally developed for the Geomview application. There is also an extension to the OFF format used by the Stella4D application to enable storage of four-dimensional data.
The format can contain common vector information such as vertices, faces, shape, edge information and also has support for including color information. As the format is text based the files can become rather large with no built-in compression options available.
OFF files support per face color information. If your uploaded model contains color information our tool will attempt to save this in the OFF file at the end of the conversion process.
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