KLayout - Your Mask Layout Friend

Start KLayout in viewer mode for an accurate and fast viewer for big mask layout files. It can read GDS2, OASIS, DXF, CIF, Gerber, LEF/DEF and other formats.

It features overlay capability for multiple layers, rulers, image overlays, many style options, switchable layer views, bookmarks, hierarchical context views, a search function, browsing by instances or shapes, selective cell blankout and much more.

Start KLayout in editor mode to get access to a rich set of editing features.

Create new layers and cells. Instantiate them in other cells. Draw polygons, boxes, wires and labels. Move, rotate, scale, mirror selected objects. Manipulate polygons and layers using boolean operations. Search and replace shapes and instances. Use parametrized cells to create complex geometries with a few clicks. Copy/paste selected objects.

All features with full and unlimited undo/redo support.

Use the rich scripting features to generate layout from scratch. Code parametrized cells (PCells) for easy creation of complex layouts in the editor. Use the integrated script development IDE to edit and debug your code.

Use the integrated XOR and diff tool to compare layouts. Develop and run design rule check (DRC) and layout vs. schematic (LVS) scripts using the integrated script development IDE. Trace nets with the integrated net tracing tool. Code analysis scripts using the rich scripting API.