Our free and fast tool will convert your 3D KMZ (Keyhole Markup Language) model files to a standard STPZ (Compressed STEP-File) file that can then be edited further in most popular 3D editing packages or 3D printed without any further processing. Our conversion tool can also batch convert multiple KMZ files; up to 200 files at a time can be converted.
To convert your KMZ 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 KMZ to STPZ conversion process, see the conversion information section below.
| Extension | KMZ |
| Full Name | Keyhole Markup Language |
| Type | 3D Model |
| Mime Type | application/vnd.google-earth.kml+xml |
| Format | Binary |
| Tools | KMZ Converters, 3D Model Voxelizer, Create KMZ Animation, Text to KMZ, KMZ Viewer |
A KMZ, which is short for Keyhole Markup Zip, is a compressed ZIP file used to contain geographic data, including 3D models, images, and terrain.
The KMZ format comprises a single KML file containing XML data and supporting assets such as images and 3D models using the Collada DAE format, all contained within a compressed ZIP format. There are several specialist map-rendering applications that can open KMZ files.
| 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 KMZ 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 KMZ file to a valid STPZ 3D model. Let's start with the conversion process, which involves the following steps:
In its simplest form, an KMZ 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 KMZ file format, please see this great article that goes into a lot of detail explaining the KMZ format.
With the KMZ 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.
Many 3D file conversion websites use the same off-the-shelf components to convert files, these often lack features and full KMZ file compatibility. Our bespoke file conversion tools offer full KMZ file compatibility and have been developed in-house by a team of developers, some of whom have over 30 years of experience working with 3D graphics file formats, meaning our tools will convert your KMZ file quickly and accurately with maximum compatibility.
Yes! Our KMZ tool supports full batch conversions. You can upload up to 200 KMZ files at a time. Our tool will convert them all as quickly as possible. Once completed, you can either download the STPZ files individually or download them all in a single ZIP file.
First click the "Upload..." button, and select your KMZ file to upload. You can also drag and drop your file onto the tool. Once your file is selected, you can set any configuration options. When the KMZ to STPZ conversion has completed, you can download your STPZ file straight away.
We aim to process all KMZ 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 KMZ file you submit to us. The resulting STPZ file, once created, is stored for 4 hours after upload; after this time it is deleted, and the short-term download link will stop working. You can create a long-term download Url with most tools that will ensure the file is retained for 24 hours, allowing you to download the file when convenient. Our tools also come with a Delete button, allowing you to delete the file immediately.
No. All our conversion tools process your KMZ 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 KMZ 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 KMZ conversion tool please consider white-listing our website. When an Ad Blocker is enabled there are some conversion limits and some settings may not be available when using our tools. Processing/conversion and download times will also be longer.
Yes. When you have converted your KMZ to STPZ, there is a "Feedback" option that you can use to let us know of any issues you encountered when converting your file.
© 2025 ImageToStl. Convert your PNG and JPG Files to 3D STL files.
