Splice CAD is a tool for designing and documenting cable assemblies and wiring harnesses, offering solutions for mapping system-level connectivity. It addresses the needs of professionals working with cable and harness projects by providing a suite of features for building assemblies, creating custom components, and defining multi-conductor cables.
The platform includes a drag-and-drop interface for designing harnesses, with real-time visual feedback rendered via SVG. Users can place connectors, route wires and cables, assign signals, and generate documentation directly within the tool. Splice CAD supports automatic bill of materials (BOM) generation with accurate part counts and specifications, and offers export options for diagrams, BOMs, and engineering drawings in high-resolution SVG, PNG, or PDF formats suitable for manufacturing documentation. Its built-in version control tracks design revisions and allows for easy rollback. The tool also features a searchable parts database with manufacturer specifications, supporting connectors from over 90 manufacturers, and provides fuzzy search and filtering to locate components efficiently.
For custom requirements, Splice CAD enables users to create their own components, such as connectors, motors, relays, and power supplies, with flexible pin layouts and a template library for common footprints. The Cable Creator feature allows specification of conductor properties, insulation, and jacket materials for multi-core cables, complemented by a wire specification library and material documentation. The tool also supports project and assembly generation from a variety of structured inputs, including PDFs, images, and spreadsheets, offering flexible data ingress and egress.
Splice CAD is available as a native desktop application for macOS, Windows, and Linux, providing offline capability, filesystem integration, and automatic updates. It also offers a browser-based version and includes developer tools such as a Python library for programmatic harness creation and automation, as well as an embeddable interactive SVG harness viewer for web applications.
Splice CAD sits in PulseGate's Diagramming & whiteboards category. It focuses on designing and documenting cable assemblies and wire harnesses efficiently without traditional CAD complexity. It is built as a B2B product for engineers and manufacturers. A free plan is available. The product ships for the web, the command line, macOS, Windows, and Linux.
Behind Splice CAD is Splice CAD, and the product first shipped in 2026. Development happens publicly on GitHub with 12 commits in the last 90 days. Key capabilities include cable assembly design, wire harness documentation, and parts library. It exposes integrations via an MCP server.
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