  We examine the low-energy signatures of axion-like particles (ALPs) in lepton
flavor violating (LFV) processes. By using a dimension-5 effective Lagrangian,
we compute the most general ALP contributions to LFV decays of leptons and
mesons. The provided expressions are valid for any choice of ALP mass and
couplings. We explore the complementarity of different processes, identifying
specific patterns to be experimentally tested. Constraints on LFV couplings are
derived from existing data and prospects for forthcoming experiments are also
discussed. As a by-product, we revisit the possibility of a simultaneous
explanation of the observed discrepancies in the muon and electron $g-2$
through ALP interactions.
