Ruleruler is a Chrome add-on developed by migueljimenezbenajes that serves as a useful tool for designers and developers. This free program falls under the category of Browsers, specifically Add-ons & Tools. With Ruleruler, users can effortlessly view the sizes of various elements and fonts without the need to open the inspector.

The main advantage of Ruleruler is its convenience. Instead of going through the hassle of inspecting each element individually, this add-on allows users to quickly and easily view all box sizes and font styles in one place. This can save a significant amount of time, especially when working on projects with numerous elements and fonts.

Ruleruler provides a straightforward and accessible solution for designers and developers to assess the sizes of elements and fonts. By eliminating the need to open the inspector, it offers a more efficient workflow. Overall, Ruleruler is a handy tool for anyone working with web design or development on the Chrome platform.