Pixel Perfect Tools is a free Chrome extension developed by rdomingue80. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool is designed to assist web designers and developers in achieving pixel-perfect designs.

With Pixel Perfect Tools, you can easily overlay a Bootstrap 3 grid onto your webpage. This grid acts as a guide, helping you align elements with precision. By enabling this feature, you can ensure that your design elements are perfectly aligned and positioned.

Please note that this extension currently does not work over https. However, for non-secure websites, Pixel Perfect Tools offers a valuable resource for designers and developers striving for pixel-perfect designs.