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Three Common Methods to Open, View, and Share STP Files

If you’re not using Sibe, there are several ways to work with STP files. Here are the three most popular:

1. CAD Software

Professional CAD softwares, like SolidWorks or AutoCAD Inventor, are the gold standard for opening STP files. These tools are powerful, enabling you to view, edit, and convert files.

How it works: Import STP files directly into the software to view the 3D model. Editing and exporting options are available in most tools.
Best for: Engineers, architects, and designers who need full design and editing functionality.

2. Free STP Viewers

Several free STP viewers, such as FreeCAD and CAD Assistant, let users open and view STP files. These tools are lightweight and focus on visualization rather than editing.

How it works: Download the software, open your STP file, and explore the 3D model. Some free viewers may also offer basic measurement or annotation features.
Best for: Occasional users or those on a tight budget who need quick access to 3D models.

3. Online STP Viewers

Web-based viewers, like ShareCAD or A360 Viewer, allow you to upload and view STP files in your browser. These tools typically require no installation and are great for quick sharing.

How it works: Upload the file to the platform, view the model directly in your browser, and share the link if needed.
Best for: Teams collaborating remotely or users who need access without installing software.

Method	Pros	Cons
CAD Software	Full editing capabilities; industry-standard tools	Expensive licenses; steep learning curve
Free STP Viewers	Free; lightweight and easy to use	Limited features; no advanced editing tools
Online STP Viewers	Accessible anywhere; great for collaboration	Internet required; often limited to viewing only

How STP Files Differ from Other File Types

STP (Standard for the Exchange of Product Model Data) files are a universal format for sharing 3D CAD models. While similar file types like IGES (.igs) or Parasolid (.x_t) also handle 3D data, each has unique traits:

STP vs. IGES: STP supports more complex 3D geometry and data, while IGES is better for 2D drawings and lightweight models.
STP vs. Parasolid: Parasolid files are more editable within their native software but less universally supported compared to STP.

STP vs. STL: STL files are ideal for 3D printing but are not easily edited like STP files.

Quickly find answers to common questions in our FAQ section

What is an STP file used for?

STP files are used to share 3D models between different CAD software, ensuring compatibility and providing references for legacy projects.

Can I edit an STP file?

Yes, but only with professional CAD software like SolidWorks or AutoCAD. Free or online viewers usually don’t offer editing capabilities. These files do not contain parametric data, so there is no design tree.

Is an STP file the same as a STEP file?

Yes, STP and STEP refer to the same file format (.stp or .step).

What softwares open STP files?

Popular options include SolidWorks, AutoCAD, FreeCAD, and online tools like ShareCAD. Blender and Maya are also options.

Are STP files compatible with 3D printers?

Not directly. You’ll need to convert STP files to STL format before sending them to a 3D printer. Some slicers are compatible directly with STP files, such as Bambu Studio.

How do I convert STP to another format?

Most CAD software lets you export STP files as STL, IGES, or DWG. Free tools like FreeCAD can also handle basic conversions. This involves opening the file in the software and navigating to the export options.

Can I view STP files on a Mac?

Yes, many software options, including FreeCAD and online viewers, are compatible with macOS.

Is there a mobile app to view STP files?

Yes, some apps, like A360 Viewer, allow you to open and view STP files on mobile devices.

Why won’t my STP file open?

Check for file corruption or compatibility issues with your software. Ensure the file extension is correct (.stp or .step). The STP files may have also been exported incorrectly.