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Our free and fast tool will convert most 3D mesh or MPD (Lego Model) model files to a standard STPZ (Compressed STEP-File) 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 MPD files; up to 25 files at a time can be converted.
To convert your MPD file, click the Upload button above and select the file to convert. Once selected, the file will be converted to a STPZ file and will be ready for download shortly afterwards. For more information about the MPD to STPZ conversion process, see the conversion information section below.
| Extension | MPD |
| Full Name | Lego Model |
| Type | 3D Model |
| Mime Type | application/octet-stream |
| Format | Binary |
| Tools | MPD Converters, 3D Model Voxelizer, Create MPD Animation, MPD Viewer |
An LDRAW file, which uses the MPD file extension, is a 3D file format used to store Lego 3D models and is a popular open format used by enthusiasts to share their Lego creations.
Contained within an MPD file is information for each brick within the Lego object, as well as color and other relevant data. MPD files can be opened with the LDraw software.
| Extension | STPZ |
| Full Name | Compressed STEP-File |
| Type | 3D Model |
| Mime Type | application/octet-stream |
| Format | Binary |
| Tools | STPZ Converters, 3D Model Voxelizer, Create STPZ Animation, Text to STPZ, STPZ Viewer |
The STPZ file format is a compressed version of the STEP file format, which is a 3D format defined in 1994 and used to store 3D objects for use in computer-aided design (CAD) applications. STPZ files are compressed binary files that, when decompressed into text format, contain one rendering command per line.
Although STEP files are widely supported by most CAD applications, there are only a few that support STPZ files. As with the uncompressed STEP version, the STPZ format does have its limitations, such as the necessity to read the complete file into memory in order to parse the contents, and due to the textual storage of information, the files can be quite large.
Converting from the MPD file format to STPZ 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 MPD file to a valid STPZ 3D model. Let's start with the conversion process, which involves the following steps:
In its simplest form, an MPD file is a binary data file containing 3D data such as vertices, faces, normals, and more. When combined, these make up the 3D model you see on your screen.
For more information regarding the MPD file format, please see this great article that goes into a lot of detail explaining the MPD format.
With the MPD 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 for exporting to the STPZ 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 it to the STPZ format.
First click the "Upload..." button, select your MPD file to upload. Select any configuration options. When the MPD to STPZ conversion has completed, you can download your STPZ file straight away.
We aim to process all MPD to STPZ 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 MPD file you submit to us. The resulting STPZ file, once created is deleted 15 minutes after upload and the download link will expire after this time.
No. All our conversion tools process your MPD file on our dedicated conversion servers, meaning you can use our tools on low-spec computers, laptops, tablets, and mobile devices and receive your converted STPZ file quickly.
Yes! Our MPD to STPZ 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 MPD 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. When you have converted your MPD to STPZ, there is a "Feedback" option that you can use to let us know of any issues you encountered when converting your file.
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