This dataset contains the laboratory experimental data collected from double-edge wedge splitting (DEWS) tests performed on ultra-high-performance fiber-reinforced concrete (UHPFRC) specimens to characterize post-cracking behavior. The experimental program included mixtures reinforced with steel fibers and PVA fibers at different fiber contents, namely CS1, CS2, CS3, CP1, CP2, and CP3. Several specimens were tested for each mixture to evaluate repeatability and variability of the post-cracking response. The dataset is provided in CSV format and includes the raw test records used for analysis, comparison among mixtures, and reproduction of the results in the PhD research project.