CurseForge · Minecraft mod
Chunk Sending
Optimizes chunk packet delivery
Quick answer
Which Chunk Sending release matches 1.20.1 NeoForge?
Chunk Sending chunksending-1.20.1-3.6.jar targets 1.20.1 with Forge, NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Chunk Sending required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Chunk Sending chunksending-1.20.1-3.6.jar need?
chunksending-1.20.1-3.6.jar on 1.20.1 NeoForge. Every mod below is checked against that same setup.
Install Cupboard first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Chunk Sending without breaking your instance.
Built for Chunk Sending chunksending-1.20.1-3.6.jar on 1.20.1 NeoForge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use chunksending-1.20.1-3.6.jar. It targets 1.20.1 with Forge, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cupboard first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside chunksending-1.20.1-3.6.jar. It opens that exact file at the source.
About this project
What does Chunk Sending add?

Optimizes chunk packet sending by prioritizing and distributing chunk delivery over time, reducing load on both servers and clients
- Smoother server login, teleporting, respawning, and dimension changes by loading nearby chunks first
- Less network strain by spreading chunk delivery over time, reducing bandwidth spikes and improving playability on slower connections
- Configurable chunk send limits over time, both per player and server wide
- Optional prioritization of chunks in the direction the player is facing
Additional optimizations:
- Reuses constructed chunk packets when sending the same unchanged chunk to multiple players, reducing server overhead
- Controls and staggers item-frame map updates, reducing traffic and processing spikes from large map displays
Mojang later adopted a similar idea in Java Edition 1.20.2 by adding delayed chunk sending to the vanilla game. On modern Minecraft versions (1.21.1+), Chunk Sending builds on the vanilla implementation by exposing configurable limits and behavior, while older versions retain the mod’s original chunk-sending system.
Requires Cupboard dependency to be installed in newer versions

- Per player and server wide chunk send limits
- Client requested chunk rate and unacknowledged batch limits
- Facing direction chunk prioritization
- Singleplayer chunk batching
- Chunk packet caching
- Nearby and dimension wide itemframe map update rates
- Debug logging
No known incompatibilities, should work fine with any mod.
Only required on serverside.
Project description from CurseForge.
Pick your setup
Chunk Sending by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
2 loader builds1.21
2 loader builds1.20.1
3 loader builds1.20
3 loader builds1.19.4
2 loader builds1.19.3
2 loader builds1.19.2
3 loader builds1.18.2
2 loader builds1.16.5
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Chunk Sending versions and loaders
chunksending-1.20.1-3.6.jar
2 Aug 2026
chunksending-1.20.1-3.3.jar
31 Jul 2026
chunksending-1.20.1-3.2.jar
31 Jul 2026
chunksending-1.20.1-3.0.jar
30 Jul 2026
chunksending-1.20.1-2.8.jar
23 Nov 2023
chunksending-1.20.1-2.7.jar
23 Sept 2023
chunksending-1.20.1-2.6.jar
1 Aug 2023
Looking for an older file? The official CurseForge project page is in Resources.