Packet AnalysisLOCALRuns in your browser
IPv4 Packet Decoder
Decode an IPv4 packet header and bounded payload from hex, including length, fragmentation, and checksum checks.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Decoded fields
Remaining payload
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How it works
Decode a complete or truncated IPv4 packet. IHL and total length are validated independently. The header checksum is recomputed; fragmentation is reported without pretending that every fragment starts with a transport header. Bytes beyond total length are not treated as payload.