CANviewer

View CAN log in your iPhone and analysis the data

CANviewer is a CAN log viewing tool designed for automotive electronics, ECU debugging, and field analysis.

You can import ASC and BLF CAN logs on iPhone, quickly view message time, CAN ID, direction, channel, DLC, and data bytes, and filter the messages you need by CAN ID, Rx/Tx, and channel.

After importing a DBC file, CANviewer can decode raw CAN data based on the signal definitions in the DBC file, convert hexadecimal data into physical values, and plot signal trends over time.

Key features:

• Import and view ASC / BLF CAN logs
• Filter messages by CAN ID, Rx/Tx, and channel
• Import DBC files and parse messages and signals
• Decode CAN data into physical signal values
• Compare multiple signal curves
• View curves in combined or separate charts
• Display X/Y axes, units, and data ranges
• Tap a curve to inspect the exact time and value
• Works offline; imported files are not uploaded

Use cases:

• Quickly inspect CAN logs in the field
• Analyze ECU signal trends
• Validate DBC signal definitions
• Support vehicle debugging and troubleshooting
• Assist engineers during road tests, business trips, and service work

CANviewer is not intended to replace complex desktop tools. It is a lightweight and direct mobile tool for CAN log viewing and signal analysis.