Light Table is an integrated development environment that includes interactive debugging and code execution features. These features can be used to inspect and modify programs as they are running. For example, users may mark variables they are interested in and watch their values change as programs execute. Users may also change bits of program code and see the results reflected immediately. Light Table has built-in support Javascript, Python, and Clojure. Numerous additional languages can be added using Light Table's plugin system. Light Table can also be used to examine the HTML, CSS, and Javascript of remote websites. Users can even make their own local modifications to see what effect they would have (for example, to try out CSS changes). Light Table is available for Windows, macOS, and Linux.