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Convert Your 3D Mesh/Model STEP Files to OBJ

Our free and fast tool will convert most 3D mesh or STEP (STEP-File) model files to a standard OBJ (Wavefront) 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 STEP files; up to 25 files at a time can be converted.

To convert your STEP file, click the Upload button above and select the file to convert. Once selected, the file will be converted to a OBJ file and will be ready for download shortly afterwards. For more information about the STEP to OBJ conversion process, see the conversion information section below.

How to Convert your STEP to OBJ Online?

Here are two simple steps to convert your STEP to OBJ.

Upload a STEP

Click the "Upload a STEP File" button and select a STEP to upload. The maximum file size is 100MB.

Download your OBJ

Click the download link once completed to receive your OBJ file.

File Format Information for STEP to OBJ

ExtensionSTEP
Full NameSTEP-File
Type3D Model
Mime Typeapplication/octet-stream
FormatBinary
ToolsSTEP Converters, 3D Model Voxelizer, Create STEP Animation, Text to STEP, STEP Viewer
Open WithCAD Assistant

Description

The STEP file format is a 3D format defined in 1994 and used to store 3D objects for use in computer-aided design (CAD) applications. STEP files are text-based, formatted files containing one instance per line.

Although STEP files are widely supported by most CAD applications, the 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.

STEP Notes

OBJ files, when imported, will be converted to 3D geometry comprising vertices and faces. If the OBJ file contains color information, this will be converted where possible.

Supported Features

  • Mesh geometry
  • Mesh colors

Description

The OBJ file format, originally created by Wavefront Technologies and later adopted by many other 3D software vendors, is a simple text-based file format for describing 3D models/geometry. This data can include vertices, faces, normals, texture coordinates, and references to external texture files.

As the format is text-based, it is relatively straightforward to parse in 3D modeling applications. A downside of the text-based format is that the files can be rather large compared to similar binary formats such as STL and compressed files such as 3MF.

OBJ Notes

Our tool will save any material and texture files separately; these additional files will be included with your final OBJ file at the time of download.

Supported Features

  • Mesh geometry
  • Materials (Via an MTL file)
  • Textures (PNG, JPG, TGA formats)

Comparing STEP and OBJ Features

 

STEP Features

  • Mesh Geometry (Vertices and Faces)
  • Vertex Normals
  • Face Normals
  • Vertex Colors
  • Face Materials (Excluding textures)
  • Textures
  • Point Cloud
  • Multiple Objects Per File
  • Object Transforms (Translation, Rotation, and Scale)
  • Bones/Joints
  • Animations
  • Suitable for 3D Printing

OBJ Features

  • Mesh Geometry (Vertices and Faces)
  • Vertex Normals
  • Face Normals
  • Vertex Colors
  • Face Materials (Excluding textures)
  • Textures
  • Point Cloud
  • Multiple Objects Per File
  • Object Transforms (Translation, Rotation, and Scale)
  • Bones/Joints
  • Animations
  • Suitable for 3D Printing

How does it work?

Converting from the STEP file format to OBJ 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 STEP file to a valid OBJ 3D model. Let's start with the conversion process, which involves the following steps:

Step 1: Read the Source STEP File

In its simplest form, a STEP file is a human readable text file file containing 3D data such as shapes, surfaces, curves and other geometric data. When combined, these make up the 3D model you see on your screen.

For more information regarding the STEP file format, please see this great article that goes into a lot of detail explaining the STEP format.

Step 2: Process File Data

With the STEP 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 OBJ format.

Step 3: Saving to the OBJ Format

The OBJ format has been around for many years and has become a standard format for 3D modeling. Most 3D modeling software can open OBJ files, which means our tool now needs to take the in-memory 3D model we created in step 2 and convert it to the OBJ format, ensuring it can be opened in all 3D modeling software with no compatibility issues.

Frequently Asked Questions

If my STEP file is compressed, can I still use it?

Yes. If your STEP file is compressed, our tool will detect this automatically and load the 3D model from the STEP file as normal.

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

Our STEP to OBJ file converter is up to 4x faster than other online or offline file converters, meaning your files are converted quickly and hassle-free. Smaller files are typically converted instantly, while larger files will take longer to process.

Will the OBJ file retain the textures from my STEP file?

Yes! If your STEP file contains textured geometry, the texture image files along with the texture coordinates (UV data) will be exported with the final OBJ file.

Is it safe to convert my STEP to OBJ on ImageToStl.com?

Yes, of course! We do not store the STEP file you submit to us. The resulting OBJ file, once created is deleted 15 minutes after upload and the download link will expire after this time.

Do I need a high-spec. computer to use the STEP to OBJ converter?

No. All our conversion tools process your STEP 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 OBJ file quickly.

Can I convert my STEP to OBJ on Windows, Linux, Android, iOS or Mac OS?

Yes! Our STEP to OBJ tool will run on any system with a modern web browser. No specialist software is needed to run any of our conversion tools.

What if I am using an Ad Blocker, will that affect things?

Yes. Although you can use an Ad Blocker, if you like our STEP 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.

Can I get support with converting my STEP to OBJ?

Yes. When you have converted your STEP to OBJ, 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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