Grids & Rulers is a free Chrome extension developed by Jeremie Patonnier. Designed specifically for web developers, this extension adds a new panel to Chrome developer tools, allowing users to create and manage overlays on web pages. These overlays serve as visual hints for developing web app layouts.

With Grids & Rulers, developers can easily create grids and rulers overlays on their web pages. The grids help in achieving pixel-perfect alignment and positioning of elements, while the rulers provide precise measurements. This visual feedback greatly simplifies the process of designing and fine-tuning web app layouts.

The extension seamlessly integrates into Chrome developer tools, making it easy to access and utilize. Whether you're a seasoned web developer or just starting out, Grids & Rulers is a valuable tool to have in your arsenal. It empowers you to create visually appealing and optimized web app layouts, ensuring a smooth user experience.