DORCHESTER3D

Free Online STP to STL Converter

Here is our free to use STP to STL 3D model converter tool that will take your STP file and convert it to the STL format ready for loading into your favourite 3D modeling package. Our 3D model converter supports batch processing of your files and can convert up to 20 STP files at one time.

Drag and drop your files here to upload or click the button above.
A maximum of 20 files can be converted at once.

Please note: Your STP file file, when uploaded to our server, will be deleted 15 minutes after upload. Please download your converted STP file file before this time.

The STP to STL model conversion tool will analyse your STP file and convert its 3D mesh data including vertices, surfaces and where applicable vector normals and texture coordinates to the STL format whilst maintaining the structural accuracy of your original STP 3D model file.

File information for STP and STL

Full NameSTEP-File
ExtensionSTP
Type3D Model
Mime Typeapplication/octet-stream
FormatBinary

The STP file format, also known as ISO 10303-21, is a 3D file format used within the area of computer-aided design (CAD) as a way to exchange data between different applications. The STP format is essentially a plain text file containing commands used to describe the 3D object.

Due to the standardized nature of the format, there is support for importing STP files into many CAD applications. STP files can, however, become quite large, and some complex files can take a long time to import into a 3D project.

Mesh Geometry

The STP format is not a mesh-based format; converting a STP file to a mesh format is possible via most CAD applications via a tessellate function.

STP Converter Capabilities

As the STP format currently does not support the use of material colors when used by tool, your converted model will contain only the mesh geometry, material colors will not be transferred to your converted file.

Full NameStandard Triangle Language
ExtensionSTL
Type3D Model
Mime Typeapplication/vnd.ms-pki.stl
FormatText

The STL file format is used for storing 3D models and is a common format for distributing 3D printable models. STL files emerged in the 1980s as a format for storing a 3D mesh as a simple list of triangles. Due to its age and simplistic format, it has gained widespread support within 3D modeling and CAD applications.

As a result of the simple file format and its widespread support amongst 3D editors, the STL format has found itself as the format of choice for the distribution of 3D printable objects. There are many websites that offer 3D printing downloads in the STL format.

Mesh Geometry

As mentioned, STL files make use of a simple structure for containing the 3D mesh data. The 3D model is stored as a continuous list of triangles, with each triangle containing three vertices specifying the location in 3D space of the triangle, which, along with a single vector normal, is all that is required to render the model contained within the STL file. There are two formats of STL files: plain text and binary. When used with large and complex 3D models, the text format leads to very large file sizes and should be avoided, with the binary format offering more efficient storage of the mesh data.

STL Converter Capabilities

As the STL format currently does not support the use of material colors in 3D models when created using our tool, your converted model will contain only the mesh geometry, material colors will not be transferred to your converted STL file.

How to Convert your STP to STL?

Here are two steps to convert your STP to STL using our free STP converter tool.

Upload your STP file

Click the "Select File" button, and then select the STP file to upload. The maximum file size is 100MB.

Download your STL

Click the download link to receive your STL file.

Frequently Asked Questions

How do I convert my STP to STL?

First, click the "Select File" button and choose your STP file. We will upload and convert your STP file. Once the conversion from STP to STL completes, use the provided link to download your STL file.

How long does it take to convert my STP file to STL?

We aim to process all STP to STL file conversions as soon as possible; this should take around 5 seconds; however, this may be longer for larger files.

Is the STP format suitable for 3D printing?

No. Most 3D printing slicer software will not support the STP format. It is recommended to convert your STP file to the STL format if you wish to 3D print it.

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