Create a self-updating Excel checklist with checkboxes, IFS due-date priority, and a progress data bar for faster tracking.

Lock dynamic arrays into fixed shapes so dashboards stay neat, tables stack cleanly, and templates keep their layout.

Build stable, high-performance dashboards using REPT formulas and UNICHAR symbols instead of conditional formatting.

CoreXLSX is a library focused on representing the low-level structure of the XML-based XLSX spreadsheet format. It allows you to open a spreadsheet archive with .xlsx extension and map its internal ...