Are you in need of viewing Autocad files but don't have access to the expensive Autocad software? Fortunately, there are several free online Autocad viewers that allow you to open and view .dwg files without needing to purchase any software. Here are some of the best tools available for viewing Autocad drawings online for free.

1. Autodesk Viewer: Autodesk offers a free online Autocad viewer that allows you to upload and view .dwg files with ease. The viewer also supports viewing 3D models, making it a versatile tool for visualizing Autocad designs.

2. DWG FastView: DWG FastView is another popular online Autocad viewer that provides a user-friendly interface for opening and viewing .dwg files. It also offers basic editing features and supports cloud storage integration for easy file management.

3. A360 Viewer: A360 Viewer is a web-based Autocad viewer that allows you to view 2D and 3D Autocad files directly in your browser. It supports multiple file formats, making it a convenient tool for viewing various design files.

4. ShareCAD: ShareCAD is a free online service that lets you view .dwg and .dxf files without the need for any software installation. It provides a simple and intuitive interface for viewing Autocad drawings and is compatible with different operating systems.

5. IrfanView: While not specifically designed for Autocad files, IrfanView is a free image viewer that supports opening and viewing .dwg files. It's a lightweight and versatile tool that can quickly display Autocad drawings along with other image formats.

These online Autocad viewers offer a convenient and cost-effective solution for anyone needing to open and view .dwg files without the need for purchasing expensive software. Whether you're a professional designer or an occasional Autocad user, these free tools provide easy access to viewing Autocad drawings online.