If you're looking for a free STP file viewer online, you've come to the right place. STP files, also known as standard for the exchange of product data files, are commonly used for 3D modeling and CAD design. To view these files without any hassle, there are several online tools available that allow you to view STP files for free. Here are the 5 best free STP file viewers online:

1. 3D-Tool: 3D-Tool is a powerful and user-friendly STP file viewer that allows you to view, analyze, and annotate 3D models with ease. The online version of 3D-Tool provides a simple and intuitive interface for uploading and viewing STP files without the need for any software installation.

2. Autodesk Viewer: Autodesk Viewer is a popular choice for viewing STP files online. It provides a range of tools for visualizing 3D models, making it easy to inspect and share STP files with others. With support for various file formats, including STP, Autodesk Viewer is a versatile option for online file viewing.

3. 3D STP Viewer: 3D STP Viewer is a web-based tool specifically designed for viewing STP files online. It offers a straightforward interface for uploading and viewing 3D models in STP format, making it a convenient option for quick file viewing without any downloads.

4. ShareCAD: ShareCAD is a versatile online CAD viewer that supports various file formats, including STP. With its user-friendly interface, ShareCAD allows you to view and share 3D models online hassle-free. It's a great option for quickly viewing STP files without any cost.

5. Online 3D Viewer: Online 3D Viewer is a simple and efficient tool for viewing STP files online without any software installation. It supports a wide range of file formats, including STP, and provides easy navigation and viewing options for 3D models.

These 5 free STP file viewers online offer a range of features and capabilities for viewing and sharing your 3D models without the need for any paid software. Whether you're a designer, engineer, or hobbyist, these online tools provide convenient options for viewing STP files from anywhere with an internet connection.