If you work with CAD files and 3D models, chances are you've come across STP files. These files are commonly used for 3D modeling and product design, but finding the right viewer to open them for free can be a challenge. Luckily, there are several online STP file viewers that are not only free but also easy to use.

One popular option is the 'A360 Viewer' by Autodesk. This web-based tool allows you to upload and view STP files without the need for any additional software. It also offers features like markup and measurement tools, making it a versatile choice for both professionals and hobbyists.

Another great online STP file viewer is the 'Online 3D Viewer' by ShareCAD. This tool supports a wide range of file formats, including STP, and allows you to view 3D models directly in your web browser. It's a convenient option for quick access to your files without the need for complex installations.

For those looking for a simple and straightforward STP file viewer, 'STP Viewer' by IdeaMK is a top choice. This online tool provides a user-friendly interface for uploading and viewing STP files with ease. It's a great option for those who need a no-fuss solution for viewing their 3D models.

If you're a SolidWorks user, the 'eDrawings Viewer' is a must-have tool. While it's not entirely web-based, it's still free to download and allows you to open and view STP files as well as other 3D formats. Its compatibility with other CAD software makes it a versatile choice for professionals in the industry.

Lastly, '3D-Tool Free Viewer' is another excellent option for viewing STP files online. This tool offers a range of features, including measurement tools and cross-section views, making it a powerful choice for those who need more advanced functionalities in their viewer.

In conclusion, there are several impressive options for viewing STP files online for free. Whether you need a simple and user-friendly tool or a more advanced viewer with professional features, these online STP file viewers have got you covered. Say goodbye to the hassle of finding the right software and start viewing your 3D models with ease using these top choices.