Broadcast and AV cable planning for macOS and Windows.
Draw the signal flow, get real cable lengths, and hand over every list the build day needs.
User manual:
English (PDF) ·
Deutsch (PDF)
Read online: manual.en.md · handbuch.de.md
- Plan in signal flow, not in drawings. Devices with real ports from 1,800+ catalogue entries, each linked to its manufacturer datasheet.
- Real cable lengths. Put the floor plan under the canvas, calibrate it, and lengths follow the drawn route — split into the stock lengths you own.
- Rooms, floors, risers, 3D. Every cable end reads floor · room · device · port; the signal path shows the whole chain through plates and house runs.
- Every list for the build day. Pull list, patch list, termination list, BOM, patch sheets, faceplates, acceptance record, QR labels — one report editor, preview equals export.
- Control at the device. ATEM multiviewer and audio, Videohub routing, PTZ cameras through the LZ Camera Bridge (joystick, presets, the shots planned in MultiCam driven and stored in the head, one offset on site, live picture and a video wall), and Green-GO intercom channels live over OSC — each in the properties of the device it belongs to, not in a separate tool.
- Scopes at the device. Waveform, vectorscope, parade and histogram (LZ Scopes) live from a device's RTSP, RTMP, SRT, HLS or MJPEG stream: Scopes next to the stream in the properties, Measure signal on a cable, Compare scopes for a selection of cameras, an optional live waveform under the device (off by default). Test patterns borderless on a screen of this computer, from the display in the plan. Desktop app with ffmpeg installed.
- On site. Phones join by QR code, tick off work and send photos back into the plan.
- Together. Live co-editing over WebRTC, optional cloud copy with revisions, a shared device library across the planner suite.
- Ask Claude. A local MCP server answers questions about the open plan.
- Offline first. One JSON file per project, secrets in the OS keychain.
 Device properties |
 ATEM multiviewer |
 Export & print |
 Cable bill of materials |
 Camera control at the device |
 Rack in 3D |
| LZ Cable Planner | WireCAD | D-Tools SI | Visio / draw.io | |
|---|---|---|---|---|
| Price | Free to use | ~$1,500–4,500 | $1,000s / yr | Subscription / free |
| Platforms | macOS + Windows + web | Windows | Windows + SQL Server | Windows / web |
| File format | JSON, git-diffable | Proprietary | Proprietary | VSDX / XML |
| Broadcast-aware (connectors, BOM, patch sheets) | Yes | Yes | Partial | No |
| ATEM / Videohub | Yes | No | No | No |
| PTZ presets from the plan, Green-GO live | Yes | No | No | No |
Full comparison: docs/comparison.html.
Requires Node.js 20+.
npm install
npm run dev # Electron with hot reload
npm test # vitest + guards
npm run build # renderer, main, preload
npm run dist # installers for macOS / WindowsLZ Scopes is vendored under src/renderer/vendor/lz-scopes/
(VENDOR.md). Update it with
npm run scopes:sync -- --upstream ../lz-scopes; npm run scopes:check
reports drift from the commit pinned in VENDOR.md (CI job scopes).
Contributing, maintainer notes and conventions: CONTRIBUTING.md.
Architecture: docs/architecture.md. Everything else in
docs/: docs/README.md.
Built with Electron, React 19, TypeScript, React Flow, three.js, Zustand and Vite.
Built and maintained by Lars Zumpe — Lars Zumpe Medienproduktion. If the planner saves you time on your next show: PayPal. Donations are optional; the app stays free to use.
Proprietär — © 2026 Lars Zumpe, alle Rechte vorbehalten. Nutzung der veröffentlichten Builds ist kostenlos; Weiterverbreitung und abgeleitete Werke sind es nicht. Siehe LICENSE. Not open source: the code is public to read.
Die gebündelten Fremdpakete behalten ihre eigenen Lizenzen; deren Texte und
Copyright-Hinweise stehen vollständig in
THIRD-PARTY-LICENSES.md (erzeugt von
scripts/generate-notices.mjs aus dem Produktions-Dependency-Baum).