If you need a tool today, these are the most highly-rated options available for Windows 10 and 11:
: A specialized app that dimensions UI rectangles in real-time using GPU-accelerated capture. It stays "always-on-top" and can measure in pixels, inches, or centimeters. Download: Get it directly from the Microsoft Store. download pixel ruler for windows
: The gold standard for modern Windows users. This free, open-source suite includes a powerful "Screen Ruler" that uses image edge detection to measure pixels automatically. Download: Available on the Microsoft Store or GitHub . If you need a tool today, these are