Poland’s first national inventory of relict charcoal hearths maps >634,000 features from light detection and ranging (LiDAR) digital terrain models (DTMs) processed in QGIS 3.18. We used relief-shaded bare-earth DTMs and web map tile services (WMTS), classifying features by size, form, slope, and environment into three main types. The open-access ReCHAR database supports research on forest history, early industries, and human–environment interactions.