CANbus Manager
Every CAN tool you reach for, in one free app
CANbus Manager is the desktop tool for anyone who works on CAN buses — EV builders, heavy-equipment techs, marine tinkerers, firmware engineers. Plug in an adapter and watch traffic live, decode it with your DBC files, chart signals, talk diagnostics to ECUs, map the whole network, and manage an Orion BMS. Free, native, and built by people who spend their days inside vehicles.
The whole bench in one window
A CAN workflow usually means one app to sniff, another to decode, a vendor tool for diagnostics, and a spreadsheet for everything else. CANbus Manager folds it into ten tabs over one connection — connect once and everything sees the same traffic, from raw frames to decoded signals to a live map of every node on the bus.
| Price | Free |
|---|---|
| Platforms | macOS (universal), Windows, Linux |
| Adapters | SLCAN USB-serial (CANdapter and friends), PEAK PCAN-USB |
| Networks | Up to 4 CAN buses simultaneously |
| Decode | DBC files, with a built-in DBC editor |
| Protocols | CANopen (EDS/DCF), J1939, ISOBUS, NMEA 2000, CHAdeMO |
| Diagnostics | UDS, OBD-II, KWP2000, XCP/CCP, CANopen SDO/NMT, CiA 402 |
| BMS | Orion BMS2 dashboard, per-cell view, profile management |
| Updates | Built-in updater on a stable or beta channel |
See it working
Monitor — live traffic, one row per ID or a chronological trace, with bus load.
Features
Ten Tools in One Window
Monitor, Decode, Transmit, Charts, Logging, Protocols, Diagnostics, Network map, DBC Editor, and an Orion BMS dashboard — the bench of single-purpose CAN utilities, replaced by tabs that share one connection.
Up to Four Networks at Once
Connect up to four CAN buses simultaneously — a vehicle bus and a charger bus, or the whole car — with every view filterable per network and frames colour-tagged by which bus they came from.
Speaks the Protocols
CANopen with EDS/DCF files, J1939 with DM1/DM2 fault decoding and address-claim tracking, ISOBUS, NMEA 2000, and CHAdeMO — decoded passively, transports and multi-frame reassembly included.
Interactive Diagnostics
A proper tester, not just a listener: UDS, OBD-II, and KWP2000 over ISO-TP, XCP/CCP calibration, CANopen SDO reads and writes with the object dictionary typing them, NMT, and the CiA 402 drive profile.
See the Whole Network
A live topology map drawn from traffic: every node the bus reveals — CANopen node IDs, J1939 source addresses, DBC transmitters — with per-node message and signal detail one click away.
Orion BMS Built In
A battery dashboard fed by the Orion BMS2 broadcast messages: pack voltage, current, SOC, temperatures, relay states, and every cell voltage live — plus profile management over ISO-TP.
Charts, Logging, Replay
Chart any DBC signal live with zoom and pan, log traffic to file, and replay captured logs through the same decode, chart, and protocol views as live traffic.
Your DBCs, In and Out
Load DBC files to decode signals — including J1939 PGN matching done correctly — edit them in the built-in DBC editor, and keep a library folder that loads on every launch.
Download
Free, for macOS, Windows, and Linux.
CANbus Manager is free — no license, no account, no hardware purchase. The built-in updater keeps it current on whichever channel you choose.
CAN adapters are sold separately — any SLCAN USB-serial adapter or a PEAK PCAN-USB works. PEAK's free driver installs in a minute; the app walks you through it.