This Handbook is the first global comparative volume that examines the use of AI and digital technologies in courts. With contributions from over seventy academics, judges, and other professionals from over twenty-five countries, it provides an interdisciplinary and cross-jurisdictional perspective on how judicial institutions are responding to the opportunities and risks posed by AI. Covering judicial use of AI across domestic and regional jurisdictions in Europe, North and South America, Asia-Pacific and Africa, this Handbook begins with the premise that introducing AI into courts is not merely a technical upgrade but a constitutional reckoning and fresh call for judicial accountability. Each chapter examines not just what AI can do for courts, but what courts must do to ensure that AI tools enhance, rather than erode judicial values, justice and the rule of law.