This book constitutes the revised selected papers of the 13th International Conference on Cloud Computing, Big Data & Emerging Topics, JCC-BD&ET 2025, held in La Plata, Argentina, during June 24-26, 2025.

The 12 full papers presented were carefully reviewed and selected from 35 submissions. They were focused on topical sections as follows: Parallel and Distributed Computing; Machine and Deep Learning; Smart Cities and E-Government; Visualization; Emerging Topics and Innovation in Computer Science Education.