
Modrinth · Minecraft mod
Packet Fixer
A simple mod to fix various problems with packets, nbt and timeouts.
Quick answer
Which Packet Fixer release should I use?
Packet Fixer 2.1.2 targets 1.21.5 with NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Packet Fixer required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Packet Fixer 2.1.2 need?
2.1.2. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Packet Fixer without breaking your instance.
Built for Packet Fixer 2.1.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 2.1.2. It targets 1.21.5 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 2.1.2. It opens that exact file at the source.
About this project
What does Packet Fixer add?
Packet Fixer
Visit my discord server: Link
Description
This mod increases the packet sizes to prevent various package erros. This mod could be used in mod packs for increasing the number of mods.
The mod is required in Client and Server sides.
Prevent these problems:
- Tried to read NBT tag that was too big; tried to allocate: X bytes where max allowed: 2097152
- Badly compressed packet - size of X is larger than protocol maximum of 2097152
- Attempted to send packet over maximum protocol size: 8388608
- Chunk Packet trying to allocate too much memory on read.
- Packet too big (is X, should be less than 8388608)
- Payload may not be larger than 1048576 bytes
- Payload may not be larger than 32767 bytes
- Packet too large: size X is over 8
- Length wider than 21-bit
- Unable to fit X into 3
- Connection timeouts
- VarLong too big
- VarInt too big
Recipe, tag and another problems try Recipe Fixer
Feel free to use this mod on your modpack
Project description from Modrinth.
Pick your setup
Packet Fixer by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Packet Fixer versions and loaders
2.1.2
packetfixer-neoforge-1.21.5-2.1.2.jar
1 Apr 2025
Looking for an older file? The official Modrinth project page is in Resources.