Clear Lag Data pack for Minecraft 1.20.1, 1.21.1
This anti lag data pack allows you to improve your vanilla servers performance a lot, while having many configuration options.
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- 52 views
- Updated
- Updated 03.09.2026
- 1.16 — 1.21.1
Data pack- Client and server
About the Clear Lag data pack
This data pack uses methods from server software like Spigot and Paper to optimize performance. You can configure many settings and even enable a small anti-crash for your server.
How to use
Use /function clearlag:menu to modify settings, view clear statistics and configure which clear/warning messages are shown.
Methods this data pack uses
- Shorter item/experience orb despawn time (valuable items and death items wont get removed through clears)
- Automatic clears which remove all items in a configurable interval
- Freezes unused entities
- Merges experience orbs
- Removes collision from farm animals
The data pack was created with the aim of being high-performing and efficient, and should not cause any lag on its own.
Server software
Works on vanilla, bukkit, spigot, paper, all forks of paper and modded servers.
Note: You should always prefer server software such as Paper as it has a lot more customizable options and overall performance that data packs can never reach. You should only use this data pack if you have to use vanilla or you still have a lot performance issues.
Credits
Originally made by E4ry, modified with their permission: ClearLag Datapack
How to install Clear Lag
With Millida Launcher
Install Millida Launcher
The launcher is free: download it at millida.net/launcher and sign in with any nickname.
Click “Install” on this page
The launcher opens and installs the data pack for Minecraft 1.16–1.21.1 automatically.
Launch the game
A profile with it appears in the launcher: click “Play”.
Manually
Download the archive
Pick the file clearlag.zip (9 KB) for your game version.
New world: “Data Packs”
When creating a world, click “Data Packs”, drag the archive into the window, then move it to “Selected”.
Existing world: the datapacks folder
Put the archive into saves/<world>/datapacks and type /reload in game.
On a server
Archive goes into the server world’s datapacks
The world/datapacks folder on the server; players do not need to install anything.
Reload the data
Type /reload in the server console or restart the server.
Use the “To server” button
On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.
Versions
With dependencies
| Minecraft | Loader | File | Date | Actions |
|---|---|---|---|---|
| 1.21 | Data pack | 1.218.9 KB | ||
| 1.19.2 | Data pack | 1.19.28.9 KB | ||
| 1.17.1 | Data pack | 1.17.18.9 KB | ||
| 1.18.2 | Data pack | 1.18.28.9 KB | — | |
| 1.16.5 | Data pack | 1.16.58.9 KB | — |
FAQ
Which Minecraft versions does Clear Lag work on?
There are files for 1.16–1.21.1, 23 versions in total. The newest is 1.21.1.
Does Clear Lag work on a server?
Yes: the data pack goes into the datapacks folder of the server world, and players do not need to install anything.
Where can I download Clear Lag safely?
On this page: the file clearlag.zip (9 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: f2eda900c8df4fc27f3156aff169a3325a8c0671.
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