LeetTest is a free Chrome extension designed to enhance the coding interview preparation experience on LeetCode. This tool generates random test cases for any LeetCode problem, allowing users to quickly test their solutions with a simple click. It includes features such as auto-generated test cases, which directly insert random data into the editor, although users should be aware that some cases may not fit all constraints. Additionally, a report button is available for users to flag issues, aiding in continuous improvement of the extension.

The extension also provides numeric difficulty ratings that go beyond the standard easy, medium, and hard classifications, giving users a clearer understanding of challenge levels. Furthermore, LeetTest displays live company tags, reflecting current trends in the tech job market. This feature is particularly useful for candidates looking to tailor their preparation to specific companies and roles.