Hex Packet Decoder
Free online hex packet decoder tool. Analyze Ethernet, IPv4, TCP, UDP, ICMP, and ARP packets from hexadecimal data. Perfect for network debugging, security analysis, and learning network protocols.
Accepts hex with or without spaces, colons, or 0x prefix. Must be even number of characters.
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Decode Network Packets from Hex Data
Our hex packet decoder analyzes raw network packet data and breaks it down into readable protocol layers. Whether you're debugging network issues, analyzing captures from Wireshark, or learning how network protocols work, this tool makes packet analysis simple and visual.
What is Hex Packet Decoding?
Network packets are transmitted as binary data, often displayed in hexadecimal format. Hex packet decoding converts this raw data into human-readable fields showing each protocol layer - from Ethernet MAC addresses to TCP port numbers and flags. This is essential for network troubleshooting and security analysis.
Packet Structure
Packet = Ethernet Header + IP Header + TCP/UDP Header + Application DataWhy Decode Hex Packets?
Network Troubleshooting
Identify malformed packets, incorrect headers, and protocol issues causing connectivity problems.
Security Analysis
Examine suspicious traffic, detect anomalies, and understand attack patterns in packet captures.
Protocol Learning
Visualize how TCP/IP works by seeing real packet structures with field-by-field breakdowns.
How to Use the Hex Packet Decoder
Common Packet Analysis Scenarios
Wireshark Analysis
Copy hex dump from Wireshark packet bytes pane for quick field identification.
CTF Challenges
Decode network forensics challenges in security competitions and CTF events.
Protocol Development
Verify packet structures when developing network applications or protocols.
Education
Learn TCP/IP stack by examining real packet examples layer by layer.
Frequently Asked Questions
The decoder supports Ethernet II frames containing IPv4 packets with TCP, UDP, or ICMP. ARP packets are also supported. IPv6 is identified but not fully decoded yet.