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4. UI Builder + Mockup tool
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.
Perfect for fast feedback, live demos, and client calls.
Free
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UI Builder - Mockup tool
Sketch UI mockups directly on live websites in Chrome
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UI Builder + Mockup tool by was hunted by in Chrome Extensions, Design Tools, User Experience. Made by and . Featured on May 6th, 2025. is not rated yet. This is UI Builder - Mockup tool's first launch.