Welcome to SCADA Protocol Tools Hub — your one-stop destination for free online SCADA protocol decoders, built for engineers, developers, and cybersecurity professionals working with SCADA, RTU, and IED systems.
Our web tools help you decode frames, analyze traffic, troubleshoot communication issues, and validate protocol data — all directly in your browser, no software installation needed.
Table of Contents
Available Online SCADA Protocol Tools
1. DNP3 Decoder Tool
Quickly decode and interpret DNP3 protocol frames.
- Convert raw hex or binary data into human-readable format
- View function codes, control fields, and object groups
- Useful for SCADA troubleshooting and substation automation
2. Modbus TCP & RTU Decoder
Decode and Analyze Modbus communications in seconds.
- Supports RTU, ASCII, and TCP
- View and interpret function codes, register maps, and CRC errors
- Ideal for PLC and RTU communication testing
👉 Use the Modbus Encoder/Decoder Tool
3. IEC 60870-5-101 Decoder
Decode and analyze IEC 60870-5-101 messages used in serial-based SCADA and power system automation.
- Break down complete frame structures including APCI, ASDU, and Cause of Transmission (COT).
- Validate field data, timestamps, and sequence numbers with instant, in-browser processing — no installation, fully client-side.
👉 Use the IEC 60870-5-101 Decoder
4. IEC 60870-5-104 Decoder
Inspect and decode IEC 60870-5-104 TCP/IP frames for modern SCADA networks and substation automation.
- Analyze APCI and ASDU layers, confirm sequence numbers, COT, type IDs, and address structures.
- Fast, browser-based decoding ensures secure, offline analysis without any software setup.
👉 Use the IEC 60870-5-104 Decoder
Why Use SCADA Protocol Online Tools?
- 100% Free & Online: No downloads or sign-ups — access instantly.
- Fast and Accurate: Built by engineers for real-world field data analysis.
- Secure: Runs in-browser — your data is never stored or transmitted externally.
- Continuously Updated: Protocol definitions are updated with new standards and vendor variations.
Who These Tools Are For
- SCADA Engineers: Troubleshoot RTU/IED communications in power systems.
- Automation Developers: Validate data exchange between PLCs and HMI systems.
- Cybersecurity Analysts: Decode and analyze industrial network captures.
- Students & Researchers: Learn how industrial protocols work at the frame level.
Learn More About SCADA Protocols
To get the most out of these tools, explore our detailed protocol guides:
Suggest a New Online Protocol Tool
We’re always expanding our toolkit.
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