Packet Analysis

Decode Ethernet, IP, TCP, UDP, ICMP, DNS, and DHCP packets from hex, in the browser.

Decode ARP hardware/protocol types, operation, and sender/target addresses from raw hex.

Decode a DHCPv4 option sequence with strict option lengths, pad/end handling, and common values.

Decode DNS wire-format headers, questions, and resource records, including compressed names.

Decode Ethernet II headers and stacked 802.1Q/802.1ad VLAN tags from hex, locally in the browser.

Inspect Ethernet, ARP, IPv4, IPv6, TCP, UDP, and ICMP layers from a bounded hex packet.

Decode ICMP type, code, checksum, rest-of-header bytes, and payload from hex.

Decode an IPv4 packet header and bounded payload from hex, including length, fragmentation, and checksum checks.

Decode the fixed IPv6 header, addresses, next-header value, and bounded payload from hex.

Decode TCP ports, sequence numbers, flags, window, options, and payload from a raw segment.

Decode UDP ports, declared length, checksum, and bounded payload from a datagram.