We live in an incredible age of microscopy,where a wide range of techniques are available to visualize the structure and properties of surfaces and interfaces.These interfaces often carry out processes that involve chemically heterogeneous fluxes,but probing these fluxes is challenging.This contribution will highlight recent developments in scanning electrochemical probe microscopes(SEPMs)that offer the prospect of fast,multifunctional and ultrasensitive flux measurements at the nanoscale,with wide application from electrochemical materials science(e.g.understanding electrocatalysts1,2 and 2D materials3,4)to the functioning of living cells.5 We will highlight new methods of probe scanning and data acquisition that allow electrochemical images to be acquired several orders of magnitude faster than previously and with better spatial resolution.6 Together with a voltammetric scanning method,7 these new approaches allow the visualization of electrochemical processes as movies that comprise hundreds of flux maps as a function of potential or time.SEPMs based on nanopipettes,such as scanning ion conductance microscopy(SICM),8 scanning electrochemical cell microscopy(SECCM)9 and hybrids of these techniques with scanning electrochemical microscopy(SECM)10,11 are very attractive because the probes are readily made,characterized and modelled,and allow simultaneous topography-functional imaging,with nanoscale surface charge5,12 and interfacial reactivity mapping demonstrated.1-4,13 These probes also form the basis for creating nanoscale electrochemical cells that can be used to detect,trap and manipulate single nanoparticles,14,15 and even single molecules,13 providing a powerful and versatile platform for the detection and analysis of single entities.