LDTViewer is a program for browsing IC layout files.

LDTViewer is a program for browsing IC layout files (in GDSII and Oasis Formats used in EDA industry). It is specifically designed to handle large files in current chip designs and to verify visually geometry and hierarchy of the layout. Product features: -fast and selective loading of large stream files -reading compressed gzipped files (.gz) -pause/stop during loading or drawing-zoom, panning, scaling -measuring distances -customized filtering (by color, filling, outline) -view the cells hierarchy -History of navigation -printing/saving view to image