Are you in need of a reliable STP file viewer online to open and view 3D CAD files? Whether you're an engineer, designer, or simply someone who needs to access and view STP or STEP files, having the right tool can make a world of difference. In this article, we'll take a look at the top 5 STP file viewers available online that can help you easily view and analyze 3D CAD files.

1. A360 Viewer: A360 Viewer is a free online tool provided by Autodesk that allows you to view 3D CAD files including STP, STEP, DWG, and many other formats. It provides a user-friendly interface and supports collaboration and sharing features, making it a great choice for teams working on CAD projects.

2. FreeCAD: FreeCAD is an open-source parametric 3D CAD modeler that comes with a built-in STP file viewer. It's a powerful tool that offers advanced features for creating and editing 3D models, and its integrated viewer makes it convenient to open and inspect STP files without the need for additional software.

3. 3D-Tool Free Viewer: 3D-Tool Free Viewer is another great option for viewing STP files online. It supports a wide range of CAD file formats and offers features such as measurement tools, section views, and annotations, making it suitable for detailed analysis and review of 3D models.

4. Online 3D Viewer: Online 3D Viewer is a web-based tool that allows you to upload and view 3D CAD files, including STP and other formats. It offers a simple and intuitive interface and allows you to share the 3D models with others, making it a convenient choice for quick viewing and collaboration.

5. Glovius: Glovius is a professional 3D CAD viewer that provides a free online viewer for STP and other 3D CAD files. It offers advanced visualization and analysis tools, including cross-sections, measurements, and animations, making it suitable for in-depth inspection and evaluation of 3D designs.

In conclusion, having access to a reliable STP file viewer online is essential for anyone working with 3D CAD files. Whether you're looking for a simple and easy-to-use tool or a more advanced viewer with analysis capabilities, there are plenty of options available to meet your needs. Consider trying out the mentioned tools to find the one that best fits your requirements and enhances your workflow.