Peek-a-Repo is an innovative Chrome add-on designed to enhance the GitHub browsing experience. It allows users to preview files, folders, and images effortlessly by simply hovering over them, eliminating the need for clicks or page navigation. The tool supports syntax highlighting for code files, displays folder structures in a mini file tree, and renders images inline, all of which contribute to a more streamlined workflow when navigating repositories.

Additional features include the ability to expand truncated files without leaving the current page, smart caching for instant hover responses, and smooth scrolling within popups. Setting up Peek-a-Repo is straightforward, requiring a quick sign-in through GitHub OAuth or the entry of a Personal Access Token for private repositories. Importantly, it prioritizes user privacy by not collecting external data and storing tokens locally in Chrome sync storage.