TCP Hex Decoder

TCP provides reliable, ordered transport with flow and congestion control. Header flag interpretation is essential for debugging handshakes, retransmissions, and resets.

Decode TCP Data

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Raw Decode Output

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Decoded Fields

Payload Hex: N/A

Payload ASCII: N/A

Additional Insights

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About TCP

TCP is a connection-oriented transport protocol used by critical applications like web traffic and APIs. Header fields coordinate reliability, ordering, flow control, and connection state transitions.

TCP provides reliable, ordered transport with flow and congestion control. Header flag interpretation is essential for debugging handshakes, retransmissions, and resets.

TCP Header Structure

Source Port + Destination Port (16 bits each): application endpoints.
Sequence Number + Acknowledgment Number (32 bits each): stream ordering and delivery tracking.
Data Offset + Flags: header size and control bits (SYN, ACK, FIN, RST, etc.).
Window + Checksum + Urgent Pointer: flow control and integrity metadata.

Why Decode TCP Packets

Decode TCP segment headers from hex to inspect ports, sequence numbers, flags, and options length.