Ladino on the Internet constitutes the first critical and systematic account written in English on the online revitalisation of Ladino. This book conclusively demonstrates that nowadays the global Ladino-speaking community connects first and foremost online, which calls for a full, comprehensive examination of the web-based development of the Sephardic diaspora (including that of Ladino) as a qualitatively different stage, termed 'Sepharad 4' in this monograph. Drawing upon the methodological framework of Revivalistics and including a comparative analysis with similar initiatives apropos Yiddish, this volume analyses case studies including YouTube digital archives, social media platforms, language learning apps, online schools, and Ladino on Netflix, plus on Web 3.0 platforms. This monograph will appeal to scholars and postgraduate students seeking to familiarise themselves with the use of technological tools to further the revitalisation of endangered languages such as Ladino. The Open Access version of this book, available at http://www.taylorfrancis.com, has been made available under a Creative Commons [Attribution-Non Commercial-No Derivatives (CC-BY)] 4.0 license.