TkN is a C++ library providing an easy and fast access to a large variety of nuclear data measurements. It allows for example to access to ground state properties, levels excited states energies and decays characteristics. TkN can be used linked with ROOT, allowing to explore the TkN database interactively in the ROOT prompt terminal. It can also be compiled without any dependancies for lighter integration in simulation codes or theoretical nuclear models. See the documentation for more download, installation, usecases and examples.