For designers, developers, and digital artists, precision is everything. When you are aligning UI elements, testing responsive layouts, or measuring pixel distances, having native on-screen guidelines makes a massive difference. Red Lines Tools screen overlay utility is a lightweight yet powerful Mac application designed to place highly accurate visual guides directly over your active windows.
Unlike traditional design tools that confine your grids to a single canvas, this utility operates system-wide. Whether you are coding in an IDE, tweaking CSS in a browser, or arranging assets in a layout engine, these persistent guides stay exactly where you need them.
Developed by Pavlo Liashenko, this application is packed with specialized instruments tailored for high-resolution environments. Here is a breakdown of what the toolset offers:
The Red Lines Tools screen overlay utility is an excellent fit for front-end developers who need to match mockups pixel-for-pixel, UI/UX designers validating layout consistency, and digital creators looking for a streamlined alignment assistant on macOS. Because the tools float transparently over all active applications, it eliminates the guesswork of positioning web and app elements.
If you are tired of taking screenshots and dragging them into design software just to check your layout alignment, this utility offers a elegant, lightweight solution that sits right in your menu bar. To try out these layout guides and precision measurements for yourself, head over to the official Mac App Store to download Red Lines Tools and elevate your design workflow.



















