Fabric Packet Logger
Deep packet logging mod for Minecraft Fabric - captures all network traffic with full NBT/Component data
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Fabric Package Logger
A deep packet logging mod for Minecraft Fabric that captures all network traffic (S2C and C2S) with full NBT/Component data.
Use Cases
- Mod Development: Debug network communication between client and server
- Container Inspection: View exact contents of inventories with full NBT/Component data and copying them
- Reverse Engineering: Analyze server-side mechanics and packet structures
- Anti-Cheat Analysis: Understand what data the server sends and receives
- Learning: Understand how Minecraft's network protocol works
Usage
Keybind
Press F6 to open the config screen.
Packet Selection
Use the dual-list selector to choose which packets to log:
- S2C (Server → Client): Incoming packets like inventory updates, entity spawns, etc.
- C2S (Client → Server): Outgoing packets like clicks, movements, etc.
Log Modes
- Chat: Display packets in the game chat (truncated for readability)
- File: Save packets to log files with full data
Log Files
Logs are saved to:
MINECRAFT_FOLDER/packet-logger/packets_2026-01-04_15-30-45_servername.log
A new log file is created when:
- Joining a world/server
- Re-enabling logging after it was disabled
Example Output
[12:34:56.789] [S2C] InventoryS2CPacket {syncId:2,revision:1,id:"minecraft:generic_9x3",components:{"minecraft:container":[{item:{id:"minecraft:diamond_sword",count:1,components:{"minecraft:enchantments":{levels:{"minecraft:sharpness":5}}}},slot:0}]}}
Available Packets
All packets are loaded dynamically from the game's PacketType registries and are selectable in the config screen's dual-list selector. Both S2C (Server → Client) and C2S (Client → Server) packets are covered across all protocol phases.
See for an example listing of all packets for Minecraft 1.21.4.
Click to expand (573 packets)
S2C (Server → Client)
Common
CommonPingS2CPacketCookieRequestS2CPacketCustomPayloadS2CPacketCustomReportDetailsS2CPacketDisconnectS2CPacketKeepAliveS2CPacketResourcePackRemoveS2CPacketResourcePackSendS2CPacketServerLinksS2CPacketServerTransferS2CPacketStoreCookieS2CPacketSynchronizeTagsS2CPacket
Config
DynamicRegistriesS2CPacketFeaturesS2CPacketReadyS2CPacketResetChatS2CPacketSelectKnownPacksS2CPacket
Custom
DebugBeeCustomPayloadBee
DebugBrainCustomPayloadBrain
DebugBreezeCustomPayloadBreezeInfo
DebugGameEventCustomPayloadDebugGameEventListenersCustomPayloadDebugGameTestAddMarkerCustomPayloadDebugGameTestClearCustomPayloadDebugGoalSelectorCustomPayloadGoal
DebugHiveCustomPayloadHiveInfo
DebugNeighborsUpdateCustomPayloadDebugPathCustomPayloadDebugPoiAddedCustomPayloadDebugPoiRemovedCustomPayloadDebugPoiTicketCountCustomPayloadDebugRaidsCustomPayloadDebugRedstoneUpdateOrderCustomPayloadWire
DebugStructuresCustomPayloadPiece
DebugVillageSectionsCustomPayloadDebugWorldgenAttemptCustomPayload
Login
LoginCompressionS2CPacketLoginDisconnectS2CPacketLoginHelloS2CPacketLoginQueryRequestS2CPacketLoginQueryRequestPayloadLoginSuccessS2CPacketUnknownLoginQueryRequestPayload
Play
AdvancementUpdateS2CPacketBlockBreakingProgressS2CPacketBlockEntityUpdateS2CPacketBlockEventS2CPacketBlockUpdateS2CPacketBossBarS2CPacketActionAddActionConsumerTypeUpdateNameActionUpdateProgressActionUpdatePropertiesActionUpdateStyleAction
BundleDelimiterS2CPacketBundleS2CPacketChatMessageS2CPacketChatSuggestionsS2CPacketAction
ChunkBiomeDataS2CPacketSerialized
ChunkDataS2CPacketBlockEntityDataBlockEntityVisitor
ChunkDeltaUpdateS2CPacketChunkLoadDistanceS2CPacketChunkRenderDistanceCenterS2CPacketChunkSentS2CPacketClearTitleS2CPacketCloseScreenS2CPacketCommandSuggestionsS2CPacketSuggestion
CommandTreeS2CPacketArgumentNodeCommandNodeDataCommandTreeLiteralNodeSuggestableNode
CommonPlayerSpawnInfoCooldownUpdateS2CPacketCraftFailedResponseS2CPacketDamageTiltS2CPacketDeathMessageS2CPacketDebugSampleS2CPacketDifficultyS2CPacketEndCombatS2CPacketEnterCombatS2CPacketEnterReconfigurationS2CPacketEntitiesDestroyS2CPacketEntityAnimationS2CPacketEntityAttachS2CPacketEntityAttributesS2CPacketEntry
EntityDamageS2CPacketEntityEquipmentUpdateS2CPacketEntityPassengersSetS2CPacketEntityPositionS2CPacketEntityPositionSyncS2CPacketEntityS2CPacketMoveRelativeRotateRotateAndMoveRelative
EntitySetHeadYawS2CPacketEntitySpawnS2CPacketEntityStatusEffectS2CPacketEntityStatusS2CPacketEntityTrackerUpdateS2CPacketEntityVelocityUpdateS2CPacketExperienceBarUpdateS2CPacketExperienceOrbSpawnS2CPacketExplosionS2CPacketGameJoinS2CPacketGameMessageS2CPacketGameStateChangeS2CPacketReason
HealthUpdateS2CPacketInventoryS2CPacketItemPickupAnimationS2CPacketLightUpdateS2CPacketLookAtS2CPacketMapUpdateS2CPacketMoveMinecartAlongTrackS2CPacketNbtQueryResponseS2CPacketOpenHorseScreenS2CPacketOpenScreenS2CPacketOpenWrittenBookS2CPacketOverlayMessageS2CPacketParticleS2CPacketPlayerAbilitiesS2CPacketPlayerActionResponseS2CPacketPlayerListHeaderS2CPacketPlayerListS2CPacketActionEntrySerialized
PlayerPositionLookS2CPacketPlayerRemoveS2CPacketPlayerRespawnS2CPacketPlayerRotationS2CPacketPlayerSpawnPositionS2CPacketPlaySoundFromEntityS2CPacketPlaySoundS2CPacketProfilelessChatMessageS2CPacketProjectilePowerS2CPacketRecipeBookAddS2CPacketEntry
RecipeBookRemoveS2CPacketRecipeBookSettingsS2CPacketRemoveEntityStatusEffectS2CPacketRemoveMessageS2CPacketScoreboardDisplayS2CPacketScoreboardObjectiveUpdateS2CPacketScoreboardScoreResetS2CPacketScoreboardScoreUpdateS2CPacketScreenHandlerPropertyUpdateS2CPacketScreenHandlerSlotUpdateS2CPacketSelectAdvancementTabS2CPacketServerMetadataS2CPacketSetCameraEntityS2CPacketSetCursorItemS2CPacketSetPlayerInventoryS2CPacketSetTradeOffersS2CPacketSignEditorOpenS2CPacketSimulationDistanceS2CPacketStartChunkSendS2CPacketStatisticsS2CPacketStopSoundS2CPacketSubtitleS2CPacketSynchronizeRecipesS2CPacketTeamS2CPacketOperationSerializableTeam
TickStepS2CPacketTitleFadeS2CPacketTitleS2CPacketUnloadChunkS2CPacketUpdateSelectedSlotS2CPacketUpdateTickRateS2CPacketVehicleMoveS2CPacketWorldBorderCenterChangedS2CPacketWorldBorderInitializeS2CPacketWorldBorderInterpolateSizeS2CPacketWorldBorderSizeChangedS2CPacketWorldBorderWarningBlocksChangedS2CPacketWorldBorderWarningTimeChangedS2CPacketWorldEventS2CPacketWorldTimeUpdateS2CPacket
Query
PingResultS2CPacketQueryResponseS2CPacket
C2S (Client → Server)
Common
ClientOptionsC2SPacketCommonPongC2SPacketCookieResponseC2SPacketCustomPayloadC2SPacketKeepAliveC2SPacketResourcePackStatusC2SPacketStatus
SyncedClientOptions
Config
ReadyC2SPacketSelectKnownPacksC2SPacket
Handshake
HandshakeC2SPacketConnectionIntent
Login
EnterConfigurationC2SPacketLoginHelloC2SPacketLoginKeyC2SPacketLoginQueryResponseC2SPacketLoginQueryResponsePayloadUnknownLoginQueryResponsePayload
Play
AcknowledgeChunksC2SPacketAcknowledgeReconfigurationC2SPacketAdvancementTabC2SPacketAction
BoatPaddleStateC2SPacketBookUpdateC2SPacketBundleItemSelectedC2SPacketButtonClickC2SPacketChatCommandSignedC2SPacketChatMessageC2SPacketClickSlotC2SPacketClientCommandC2SPacketMode
ClientStatusC2SPacketMode
ClientTickEndC2SPacketCloseHandledScreenC2SPacketCommandExecutionC2SPacketCraftRequestC2SPacketCreativeInventoryActionC2SPacketDebugSampleSubscriptionC2SPacketHandSwingC2SPacketJigsawGeneratingC2SPacketMessageAcknowledgmentC2SPacketPickItemFromBlockC2SPacketPickItemFromEntityC2SPacketPlayerActionC2SPacketAction
PlayerInputC2SPacketPlayerInteractBlockC2SPacketPlayerInteractEntityC2SPacketHandlerInteractAtHandlerInteractHandlerInteractTypeInteractTypeHandler
PlayerInteractItemC2SPacketPlayerLoadedC2SPacketPlayerMoveC2SPacketFullLookAndOnGroundOnGroundOnlyPositionAndOnGround
PlayerSessionC2SPacketQueryBlockNbtC2SPacketQueryEntityNbtC2SPacketRecipeBookDataC2SPacketRecipeCategoryOptionsC2SPacketRenameItemC2SPacketRequestCommandCompletionsC2SPacketSelectMerchantTradeC2SPacketSlotChangedStateC2SPacketSpectatorTeleportC2SPacketTeleportConfirmC2SPacketUpdateBeaconC2SPacketUpdateCommandBlockC2SPacketUpdateCommandBlockMinecartC2SPacketUpdateDifficultyC2SPacketUpdateDifficultyLockC2SPacketUpdateJigsawC2SPacketUpdatePlayerAbilitiesC2SPacketUpdateSelectedSlotC2SPacketUpdateSignC2SPacketUpdateStructureBlockC2SPacketVehicleMoveC2SPacket
Query
QueryPingC2SPacketQueryRequestC2SPacket
License
This project is licensed under the GNU General Public License v3.0.
Credits
- Fabric API Team
- Minecraft Modding Community
Verfügbare Versionen
1.2.3release
MC 26.2fabric
1.2.3release
MC 26.1.2fabric
1.2.3release
MC 26.1.1fabric
1.2.3release
MC 26.1fabric
1.2.3release
MC 1.21.11fabric
Fabric Packet Logger auf deinem Client installieren
1
Mod-Loader lokal installieren
Installiere fabric für deine lokale Minecraft-Version.
2
Passende Datei herunterladen
Wähle die Fabric Packet Logger-Datei für fabric und Minecraft 26.2.
3
Mod installieren
Lege die .jar-Datei in deinem lokalen .minecraft/mods-Ordner ab und starte Minecraft neu. Eine Installation auf dem Server ist nicht nötig.
Kompatibilität
Mod-Loader
fabric
Minecraft-Versionen
26.2, 26.1.2, 26.1.1 (+13 weitere)
Server-seitig
✗ Nicht unterstütztEmpfohlener RAM
4 GB(min. 3 GB)Häufige Fragen
Muss Fabric Packet Logger auf dem Minecraft Server installiert werden?
Nein. Modrinth kennzeichnet Fabric Packet Logger serverseitig als nicht unterstützt. Installiere die Mod nur im lokalen Minecraft-Mods-Ordner. Dein Server kann unverändert bleiben, sofern die Mod-Seite keine zusätzliche Abhängigkeit nennt.
Welche Version und welchen Loader braucht Fabric Packet Logger?
Nutze eine Datei für fabric und exakt deine Minecraft-Version. Unterstützte Versionen sind unter anderem 26.2, 26.1.2, 26.1.1. Loader-Dateien sind nicht untereinander austauschbar.
Fabric Packet Logger funktioniert nicht – was kann ich prüfen?
Prüfe zuerst Minecraft-Version, Loader-Version und erforderliche Abhängigkeiten. Lege die .jar-Datei im lokalen .minecraft/mods-Ordner ab und entferne ältere Duplikate. Da die Mod clientseitig ist, löst mehr Server-RAM dieses Problem nicht.
Ähnliche Mods
Minecraft Server für deine Gruppe
Fabric Packet Logger bleibt auf deinem Client. Hoste dazu eine kompatible Welt für deine Mitspieler.
Empfohlener RAM
4 GBab €5.2/Monat
Min. 3 GB | +1 GB pro 8 Spieler
Client-Kompatibilitätsanleitung
NVMe SSD Speicher
DDoS-Schutz inklusive
Unterstützte Versionen
26.226.1.226.1.126.11.21.111.21.101.21.91.21.81.21.71.21.6+6 mehr