Link & Alt Checker is a Chrome add-on designed to assist web developers and content managers in improving the quality of HTML coding. This tool enhances accessibility and SEO by providing features that allow users to visualize links, check alt attributes, and display meta information. It streamlines the quality-checking process, making it easier to identify potential issues in web pages.

Key features include link visualization that highlights all URLs on the page, making it easy to spot misconfigurations, and an alt attribute checker that highlights the content of image elements to ensure accessibility standards are met. Additionally, it provides a floating panel for quick access to meta information such as title and description, while also offering a 404 link detection feature that highlights broken links in real-time, ensuring that users can maintain a high standard for their web content.