Draw, highlight, and annotate on any webpage - the simplest way to comment as you browse! We fixed what competitors missed: ➤ Scrolling without losing drawings ➤ Compact interface that doesn’t cover 2/3 screen ➤ One-click screenshot saving.

UI Builder is a Chrome extension for quick, sketch-style wireframes directly in your browser. Drag buttons, inputs, headers onto any page or blank canvas. Perfect for fast feedback, live demos, and client calls.