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UI Builder – Mockup Tool

https://ui-builder-tool.com/
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Overview

UI wireframes in Chrome. Drag sketch-style elements, resize, and screenshot easily.

UI Builder – Mockup Tool is a fast Web Wireframe & Web Design Tool that lets you sketch UI layouts on any live page or on a new blank page. Quickly show clients possible design changes directly on the live website, without switching tools. 🔵 Built for designers, product owners, developers and business analysts who need instant mockups without leaving the page. Drag-and-drop hand-drawn widgets, resize them smoothly, edit text in place, snap a quick screenshot, and share — all 100 % locally in your browser for rapid prototyping. 🔹 Instant wireframes – turn any site (or a blank canvas) into a playground for mockups 🔹 True WYSIWYG – change button labels, headers and colours right on the screen 🔹 Keyboard friendly – Ctrl/⌘ + C/V to duplicate, Delete to remove, Esc to cancel 🔹 Pixel-perfect exports – save the selected area as PNG or copy a screenshot to clipboard 🔹 Privacy first – no network calls, analytics or trackers; data lives in chrome.storage.local 🔹 Lightweight – injected only on demand, keeping everyday browsing fast 1️⃣ Install & pin the toolbar icon 2️⃣ Click UI Builder – the palette appears 3️⃣ Drag widgets (buttons, headers, inputs, frames, dividers…) onto the page or blank canvas 4️⃣ Resize / recolour until it looks right 5️⃣ Press the disk icon, draw a marquee, confirm ✓ – get your PNG or paste straight to Slack / Figma / Jira Perfect for: 🔹 quick idea sketching before opening heavy design tools 🔹 annotating client websites during live calls 🔹 teaching web-design basics without extra software 🔹 creating product screenshots for specs and tickets 🚀 Add "UI Builder – Mockup Tool" Chrome extension today and start wireframing the web in one click!

Details

  • Version
    1.2.1
  • Updated
    August 8, 2025
  • Size
    111KiB
  • Languages
    30 languages
  • Developer
    Aleksandr Heinlaid
    ASUNDUSE TN 4-12, TALLINN, Harjumaa 11416 EE
    Website
    Email
    alx.hnld@gmail.com
    Phone
    +372 5624 3029
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.

Privacy

The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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