Alt to title is a free Chrome extension developed by Marc Brillault. It falls under the category of Browsers and is specifically listed as an Add-ons & Tools subcategory. The purpose of this extension is to copy the alt attributes of images and display them as titles when hovering over the image.

The main function of Alt to title is to make alt attributes visible for testing, debugging, or simply to observe how others are using these attributes. Alt attributes are typically used to convey information about graphical elements such as images or videos, allowing visually impaired individuals to navigate a page without losing context.

Upon installation, the extension scans the source code of the web page and duplicates the alt attribute into the element's title attribute. This allows users to view the alt attribute content by hovering their cursor over the respective element.

The initial version of Alt to title focuses on images (img tags) and also monitors any changes in the DOM, ensuring that newly loaded images have their alt attributes managed as well.