KLayout
Matthias Köfferlein
Download from the vendor
www.klayout.de
A program for viewing and editing integrated-circuit layouts in the formats used across the semiconductor industry: GDS2, OASIS, DXF, CIF, Gerber and LEF/DEF. It opens very large files quickly and offers XOR comparison between versions, boolean operations, parametrised cells and full undo. A built-in IDE for Ruby and Python scripts lets you run DRC and LVS checks and generate layout automatically. It is a core tool in open-source chip design flows, and PCB engineers also use it to inspect Gerber files.
Ratings & Reviews
| Licence type | Completely Free, Open Source |
|---|---|
| Licence terms | Open-source licence (GPL-3.0). Free for any purpose including commercial work, with no time limit, no registration and no licence key. |
| Platforms | Linux, macOS, Windows |
| Engineering field | Electrical & Electronics |
| Tool type | Electronics Design (EDA) |
| Vendor site | www.klayout.de |
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Last verified: 2026-10-05
