This document discusses building augmented reality (AR) experiences on the web. It begins by introducing AR frameworks like A-Frame that allow creating AR scenes directly in the browser. Examples are shown of building an online art gallery in VR and AR using A-Frame and AR.js. The document then covers using the emerging WebXR standard to access device sensors for AR. Key optimizations for AR/VR like image compression and format changes are demonstrated to significantly reduce file sizes. In conclusion, the document outlines that AR can currently be developed for the web and performance optimized without large data usage or processing requirements.