Online Tool
IEC 101 Decoder Tool
Interpret IEC 60870-5-101 serial frames: link addresses, control fields, function codes, and ASDU type IDs with causes.
Raw HEX Frame Input
Cleaned chars: 0
Bytes: 0
Live decoding enabled
No hex pasted yet. Try Sample to see the decoder in action.
About this tool
Decode raw hex captures (Wireshark, serial sniffer, SCADA gateway logs) field by field — no sign-up, no uploads, everything runs in your browser. Supported input formats:
- Spaces, commas, colons, newlines,
0xprefixes, mixed case hex. - Single frame or concatenated frames; the first complete frame is decoded.
- Click Sample for a realistic frame typical of this protocol.
- All parsing is local (no network calls, no telemetry).