VarUI Validator is an essential browser add-on designed for front-end developers, QA engineers, and designers. This free tool seamlessly integrates into Chrome, offering a DevTools-style element picker that allows users to inspect and validate CSS styles directly on any webpage. Users can select elements to view their computed CSS properties, compare styles side-by-side, and validate design tokens from Figma with ease.

The functionality includes inspecting entire component trees and working across various environments, including localhost and staging sites. To use, simply click the icon in the toolbar, and the side panel will provide instant results for selected elements. VarUI Validator ensures data privacy by storing Figma tokens locally, making it a reliable choice for UI validation.