WebWeave is a browser extension and serverless platform that allows users to instantly create a temporary, collaborative overlay on any live website. It solves the problem of disjointed feedback and limited co-browsing experiences by enabling real-time, contextual interaction directly on a webpage. Users can invite others to a session where they can see each other’s cursors, draw, annotate, leave sticky notes, highlight elements, or even apply temporary visual effects for design testing or playful interaction, all without altering the original site’s code. This makes design reviews, user testing, and shared online experiences more intuitive and efficient.