Guides is a free Chrome add-on developed by Stefano Vollono that provides a simple solution for aligning elements on web pages. This app allows users to create, modify, and delete horizontal and vertical guides, making it easy to check if elements are correctly aligned.

With Guides, users can easily ensure that their web page elements are perfectly aligned by creating guides that act as visual reference points. The app offers a user-friendly interface, allowing users to quickly and efficiently create new guides by double-clicking on a ruler. Likewise, deleting guides is as simple as double-clicking on the guide itself.

By using Guides, web developers and designers can save time and effort, as the app streamlines the process of aligning elements on web pages. Whether you're working on a complex layout or simply want to ensure pixel-perfect alignment, Guides is a handy tool to have in your arsenal.

Please note that Guides can be easily accessed by pressing the ESC key or clicking on the browser icon, allowing for quick and seamless navigation in and out of the application.