For system-wide measurements over any application, these native tools offer the best performance:
If you only need to measure elements within a web browser, extensions are often more convenient: download pixel ruler
Offers bounds detection, horizontal and vertical spacing, and "spacing" mode to measure both at once. For system-wide measurements over any application
A specialized tool available on the Microsoft Store that uses GPU-accelerated edge detection to find the dimensions of UI elements automatically. horizontal and vertical spacing
Looking to for your design or development projects? You have several high-quality options depending on whether you need a native desktop app or a quick browser extension. Best Pixel Ruler Downloads for Windows and Mac