Splice – CAD for Cable Harnesses and Electrical Assemblies
I first posted Splice CAD as an in-browser tool for making cable harnesses. Since then it’s grown in both features and scope — the direction is moving from “harness-only” toward a lightweight CAD for wiring and electrical assemblies. New functionality includes: Editing Enhancements - Full undo/redo to easily restore editor state - Multi-select & group actions to move, delete, and add components - Bulk connect tool to create straight-through, crossover, or custom wiring patterns quickly - Multiple connections per pin allow for daisy chains, etc. Documentation Additions - Multi-page PDF…
In plain words
Splice is an in-browser CAD tool for designing cable harnesses and electrical assemblies. It lets users create wiring diagrams with features including undo/redo, multi-select editing, bulk connection tools for patterns, and multi-pin connections for daisy chains. The tool can export designs as multi-page engineering PDFs and WireViz YAML files. It's built for engineers and technicians who need a lightweight alternative to traditional CAD software for electrical and wiring projects.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I first posted Splice CAD as an in-browser tool for making cable harnesses. Since then it’s grown in both features and scope — the direction is moving from “harness-only” toward a lightweight CAD for wiring and electrical assemblies. New functionality includes: Editing Enhancements - Full undo/redo to easily restore editor state - Multi-select & group actions to move, delete, and add components - Bulk connect tool to create straight-through, crossover, or custom wiring patterns quickly - Multiple connections per pin allow for daisy chains, etc. Documentation Additions - Multi-page PDF configurator to add A2, A3, or A4 pages for engineering drawing downloads - WireViz YAML export (generate WireViz diagrams directly: https://www.danielrojas.net/projects/wireviz) Library and Component Additions - Expanded beyond harnesses to include categories for more applications: connectors, cables, breakers, fuses, switches, motors, power supplies - Magic MPN button in the Component Creator to auto-fill specs from part numbers Try it out, no signup: https://splice-cad.com/#/harness Docs & tutorials: https://splice-cad.com/#/tutorial
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