Visualization can be a motivating way to teach students about molecules. Nowadays, the available experimental data and accurate computational results allow students to build realistic and accurate molecular models. These models include the representation of complex systems such as proteins, membranes, or nanotubes. However, the visualization of these three-dimensional (3D) structures can be challenging, complex, or even abstract for most people. To make the visualization easier and more motivating, BioSIM Augmented Reality (BioSIM[superscript AR]) was developed as a free online software program to provide a new way to visualize and interact with 3D molecular models in a virtual environment. Using augmented reality (AR) and quick response code technologies, BioSIM[superscript AR] provides tangible models of molecules to help illustrate chemical concepts. BioSIM[superscript AR] runs on any electronic device, including mobile phones, tablets, laptops, or desktop computers with a camera and an internet connection, without requiring the installation of additional software. This software program helps people visualize and understand concepts about atoms and molecules, and their characteristics. BioSIM[superscript AR] is freely available at https://ar.biosim.pt/.