The hypermedia formats HAL and HAL-FORMS are very popular within the REST community. In order to be able to quickly explore and try out such APIs, Kai Tödter developed the HAL Explorer tool. HAL-Explorer is a web application developed with Angular + Bootstrap that can be easily integrated into existing services. In this session, Kai first gives an introduction to HAL and HAL-FORMS and then gives an overview of the capabilities of HAL Explorer using many examples. The open-source project can be found at https://github.com/toedter/hal-explorer, a demo of the current release is available at https://toedter.github.io/hal-explorer/release/hal-explorer/#theme=Cosmo&uri=examples/examples.hal-forms.json.