GitHub Compare LOC By Extension is a Chrome extension that displays the lines of code (LOC) organized by file extension on GitHub's Compare & Pull Request pages. It offers this functionality on various GitHub pages such as Commit, Compare, and Pull Request. The recent updateindicates that it now somewhat supports GitHub's pjax (pushState + ajax) and functions on commit pages as well.

This tool is sponsored by SameSystem A/S, providing users with insights into codebase metrics directly within the GitHub interface. GitHub Compare LOC By Extension enables developers to quickly assess the distribution of code across different file types, aiding in code review and analysis.