Sketch UI mockups directly on live websites in Chrome
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. Edit text, resize, screenshot, and share — perfect for fast feedback, live demos, and client calls.
The tool provides WYSIWYG editing with instant PNG export and clipboard copy functionality, allowing users to capture annotated designs and paste them directly into Slack, Jira, or Figma for documentation.
All data is stored locally in chrome.storage.local with no network calls, analytics, or trackers. This ensures complete privacy and offline functionality for sensitive design work.
UI Builder is lightweight, browser-based, and requires no setup beyond a Chrome extension. It provides a simple drag-and-drop interface with hand-drawn widgets, making it ideal for educational demonstrations and teaching fundamentals.
UI Builder lets users drag-and-drop hand-drawn widgets directly onto any webpage or blank canvas, enabling instant mockups in the browser. This eliminates the need to switch tools and allows rapid prototyping before committing to full design work.
Users can overlay mockup elements on any live website, edit text and colors in place, and take pixel-perfect screenshots to share. This enables real-time design feedback without modifying the actual site.