Free Online STP to STEP Converter

You can use our STP to STEP conversion tool to quickly and easily convert your 3D model files for free. You may upload up to 20 files at one time, and our batch STP to STEP converter will process each 3D model and present you with a download link for each file once completed.

Select File(s)

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

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

Our 3D model STP to STEP tool will load your STP file and, where supported, attempt to extract all the relevant 3D features, such as geometry, textures, and animations. To access the 3D conversion configuration options, click the button when you have selected your files. The current options support the ability to voxelize your 3D model and more.

How to Convert your STP to STEP Online?

Here are two simple steps to convert your STP to STEP using our fast and free STP converter tool.

Upload your STP file

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

Download your STEP

Click the download link to receive your STEP file.

Frequently Asked Questions

How can I convert my STP file to STEP?

First, click the "Upload..." button and select your STP file to upload. Your STP file will be uploaded to our servers. When the STP to STEP conversion has completed, you can download your STEP file right away.

How long does it take to convert my STP to STEP?

We aim to process all STP to STEP conversions as quickly as possible; this usually takes around 5 seconds; however, this can be longer for certain files, so please be patient.

How accurate is the STP to STEP conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development, with new features being added every week.

How does converting STP to STEP work?

In order to successfully convert an STP formatted file to the STEP format, our converter tools will perform several initial checks to ensure the file provided is indeed an STP file. There are many files out there where the file type extension does not match the data contained within the file. Along with these file type checks, our tools will do additional checks to ensure the file is correctly formatted to match the provided file type. There are many tools out there that do not always create STP files to the exact specification.

Take your STP file

The STP file format is a text-based format, meaning its contents are human-readable, making STP files straightforward to edit in simple text editors. Within this text-based format are the core elements that make up the 3D model, including points, lines, edges, faces, and more. To ensure efficient conversions, our tool will check all data that is contained within the STP file and remove any information that is duplicated. STP files are notoriously slow to process, even on high-end computer systems, which is why our STP to STEP converters have been hand-optimized for speed making our STP converters the fastest available.

Convert the data from STP to STEP

Now that the data from the STP file has been processed, our tool can apply any conversion specified options, such as enabling Voxel mode, and with these applied, prepare the data to be converted to the final STEP file format. Part of this process ensures checking the capabilities of the STEP format and removing any data that cannot be represented.

Save to the STEP format

At this point, the STP to STEP conversion tool will have the 3D model in a state that is ready to be transferred to the STEP format. Our tool creates the STEP file, ensuring all the model data is present and is formatted to match the STEP file specification to ensure the file opens in compatible STEP file editors. As STEP files can quickly become very large due to the inefficiencies of the STEP format when used in conjunction with large STP mesh files, our converter will only convert STP files to STEP when the resulting file is no larger than 100 MB.

File format information for STP and STEP

Extension	STP
Full Name	STEP-File
Type	3D Model
Mime Type	application/octet-stream
Format	Text
Opens With	CAD Assistant

STP files are a 3D file format used to store complex 3D object definitions in a standard format to facilitate data transfer between compatible 3D modelling and CAD (Computer Aided Design) applications. In addition to storing 3D object data, the STP format can store additional information such as materials, tolerances, and other relevant data.

The STP format was first released in the early 1990's, has become a standard for 3D object storage, and is used in automotive, electronics, and other industries. STP files can be opened in most modern CAD applications and can be imported into many 3D modelling applications too.

The file content is ASCII text-based and conforms to the ISO-10303-21 standard. The 3D object contained within the STP file is described using a combination of points, lines, and edges. Due to the format being ASCII text, complex objects can lead to large file sizes. In addition to large file sizes, some complex STP files can take a long time to open within editing applications, even on a high-spec, modern computer.

STP Converter Capabilities

When converting 3D model or mesh files using our STP converter, we will attempt to convert colour materials into a suitable format for use in the converted file.

Extension	STEP
Full Name	STEP-File
Type	3D Model
Mime Type	application/octet-stream
Format	Text
Opens With	CAD Assistant

STEP files are a 3D file format used to store complex 3D object definitions in a standard format to facilitate data transfer between compatible 3D modelling and CAD (Computer Aided Design) applications. In addition to storing 3D object data, the STEP format can store additional information such as materials, tolerances, and other relevant data.

The STEP format was first released in the early 1990's, has become a standard for 3D object storage, and is used in automotive, electronics, and other industries. STEP files can be opened in most modern CAD applications and can be imported into many 3D modelling applications too.

The file content is ASCII text-based and conforms to the ISO-10303-21 standard. The 3D object contained within the STEP file is described using a combination of points, lines, and edges. Due to the format being ASCII text, complex objects can lead to large file sizes. In addition to large file sizes, some complex STEP files can take a long time to open within editing applications, even on a high-spec, modern computer.

STEP Converter Capabilities

When converting your STP to STEP, our tool will attempt to accurately convert any colour or material information.

Information for converting from STP to STEP

Your STP file will be converted to a STEP file using our unified 3D model and mesh conversion tool. Our STP 3D tool performs accurate conversions of 3D elements such as vertices, faces, normals, and relevant material information. As both STP and STEP support colour material information, our tool will also attempt to convert the colour information.