QUAREP-LiMi aims to define standard operating procedures and tools for device monitoring, benchmarking and quality management of light microscopy instruments and images that are aligned with existing ISO standards, as well as to develop in liaison with ISO or other stakeholders (corporate partners, funders and publishers) a community-based consensus around microscope and image data QC (see Boehm et al, Nature Meth 18:1418, 2021) Registration not required.