Home3D Model ConverterSTL Converter

Free Online STL Converter

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your STL file, once uploaded to our server will be deleted 15 minutes after upload so please download your converted STL file before this time.
Our STL converter tool supports converting to the following file types:

How to Convert your STL file Online?

Here are 3 simple steps to convert your STL file using our fast and free STL file converter tool.

Upload your STL file

Click the "Select File(s)" button, then select an STL file to upload. The maximum file size is 100MB.

Select file type

Select the file type to convert your STL file to using the dropdown list of available types.

Download your file

Click the download link to receive your converted file.

STL file format information

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

An STL file, short for Stereolithography, is a widely used file format in 3D printing and computer-aided design (CAD) applications. It serves as a standard method to represent the surface geometry of a three-dimensional object. The format was first developed by 3D Systems in 1987 and has since become a fundamental file type in the additive manufacturing industry. STL files are essential in the process of converting digital 3D models into physical objects through 3D printing technology.

STL files consist of a collection of triangular facets that approximate the shape of the 3D model. The surface of the object is divided into numerous small triangles, forming a mesh representation. Each triangle is defined by three vertices in 3D space and possesses information about its orientation and size. Since STL files store only the outer surface of the model, they are often referred to as "mesh" files or "surface" files, as they lack information about the object's internal structure or color.

When using STL files for 3D printing, slicing software processes the 3D model by dividing it into layers and creating the instructions for the 3D printer to build the object layer by layer. Despite its simplicity and widespread usage, STL files have some limitations. They do not support color or texture information, and the triangle-based representation can lead to larger file sizes and reduced accuracy compared to other file formats. Nonetheless, STL remains a vital format in the 3D printing ecosystem due to its simplicity and compatibility with a wide range of 3D printers and software.

STL Converter Capabilities

Our STL converter can both convert from and to STL files and our developers are working to improve our STL conversion tools in future versions.When converting 3D Model/Mesh files using our STL converter we will attempt to convert color materials into a suitable format for use in the converted file.

Popular STL Tools

Frequently Asked Questions

How accurate is the 3D file conversion?

Our STL conversion tool can convert most 3D geometry including mesh vertices and faces with no loss of detail. Any color materials contained within the 3D model file will be converted where possible.

Are textures supported in the STL conversion?

No, due to the different methods of assigning textures to a 3D model textures are not currently supported. If your STL model contains textures or references to external texture files, these will be ignored.

Is it free to use the STL conversion tools?

Yes! Our STL conversion tools are 100% free to use.

Are there any STL conversion usage limits?

No, you can convert as many files as you wish. We do not impose any conversion limits on our STL conversion tools.

How long does it take to convert my STL?

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

What does the STL conversion process involve?

Once your STL file has been uploaded and we know the file format you wish to convert it to our bespoke conversion software will convert your STL and make it available for you to download with a unique download Url.

Is it safe to convert my STL on FabConvert.com?

Yes, of course it is! Your STL, once converted is deleted 1 hour after upload and the download link will expire after this time.

Can I convert my STL on Linux, Android, iOS or Mac OS?

Yes! Our STL conversion tools will run on any system with a modern web browser.

Is there any support for me when using the STL tool?

If you are having difficulty converting your STL you can contact us and we will try to help where possible.