Recent ALICE measurements of jet splittings in Pb–Pb and pp collisions at sNN=5.02TeV are reported. These measurements scan the phase space of jet emissions in search of medium-induced signals which are expected to emerge at different scales. These include effects such as multiple soft-radiation, single hard emissions, and color coherence. The Lund plane diagram is shown, including projections onto distributions of the splitting scale kT in intervals of the splitting angle Rg. Soft Drop grooming is applied to access hard splittings within the jet, enabling measurements of groomed substructure variables. These include the shared momentum fraction zg between the two hardest subjets and the number of Soft Drop splittings nSD. The results in Pb–Pb collisions are compared to PYTHIA events embedded into a Pb–Pb background to separate out background from in-medium effects. Measurements of zg and the normalized splitting angle θg will also be shown in pp collisions at sNN=5.02TeV for different grooming settings.