If you're a 3D modeling enthusiast or a professional designer, you've likely heard of Sketchup. It's a popular and versatile tool for creating 3D models, architectural designs, and more. But what if you're looking for a free alternative that you can use online? Whether you're just starting out or you want to try something new, there are several free options available that offer similar features and capabilities. Here are the top 5 free Sketchup alternatives for online use: 1. Tinkercad: Tinkercad is a free online 3D design and modeling tool that's perfect for beginners. It's easy to use and offers a range of basic tools for creating simple 3D models. 2. Vectary: Vectary is an online 3D design tool that's perfect for creating photorealistic 3D models and scenes. It's great for both beginners and professionals, and it offers a range of features for creating complex designs. 3. Sketchup Free: Yes, Sketchup itself offers a free online version of its software. While it may not have all the features of the paid version, it's still a powerful tool for creating 3D models and designs. 4. Morphi: Morphi is a free 3D design app that's perfect for creating models on the go. It's available for both desktop and mobile devices, making it easy to use no matter where you are. 5. 3D Slash: 3D Slash is a free online 3D modeling tool that's perfect for creating voxel-based designs. It's simple and fun to use, making it great for beginners and younger users. Whether you're a professional designer or a hobbyist, there are plenty of free Sketchup alternatives available online. These tools offer a range of features and capabilities, making it easy to find the perfect option for your 3D modeling and design needs.