harness.design

harness.design is a web-based CAD tool for designing wire harnesses, built for home builders, garage fabricators, professional wiring shops, race teams, and anyone else who needs to design and document a harness.

It's fast and visual by design. Instead of filling out tables or clicking through complex menus, you work directly on the canvas, dragging, connecting, and arranging your harness interactively. The result is a clean, readable design you can produce in a fraction of the time, whether you're rewiring a classic car, building a competition harness, producing looms for clients, or wiring anything from a boat to a small aircraft.

Being fully web-based means there's nothing to install. Just open a browser and start designing.