Undercov is a free Chrome add-on developed by Kevin Yeh that offers a convenient way to overlay code coverage reports onto the Github user interface. This tool allows users to pull code coverage reports from various HTTPS sources and display them directly on Github filetrees and pull requests.

With Undercov, developers can easily view code coverage information without leaving the Github platform. The add-on seamlessly integrates with the Github UI, providing a hassle-free experience. By overlaying code coverage reports, users can quickly identify areas of their codebase that need improvement and ensure that their tests are sufficient.

Undercov is a valuable tool for developers who want to improve code quality and ensure thorough test coverage. By providing an easy way to access and visualize code coverage reports, this add-on enhances the Github experience and streamlines the development process.