CurseForge · Minecraft mod
Crackers
Client-sided seed cracking mod for Multiplayer and Singleplayer
Quick answer
Which Crackers release should I use?
crackers-1.1.5-1.21.1.jar targets 1.21, 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Crackers 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 crackers-1.1.5-1.21.1.jar need?
crackers-1.1.5-1.21.1.jar. 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 Crackers without breaking your instance.
Built for crackers-1.1.5-1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use crackers-1.1.5-1.21.1.jar. It targets 1.21, 1.21.1 with Fabric; 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
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 crackers-1.1.5-1.21.1.jar. It opens that exact file at the source.
About this project
What does Crackers add?
Crackers
Hey! Welcome to my mod, Crackers. A completely client-sided mod to extract the seed from Singleplayer and Multiplayer worlds made by reverse-engineering Minecraft's terrain and structure generation.
How to use this mod? (Most recent file is 1.1.5, go and try it!)
In Singleplayer, just join the world and the mod will read the seed from the host, regardless of permissions. However, if you join a multiplayer server the process takes a little longer but still very straightforward.
To get the seed of a multiplayer server you must simply walk around the world and explore (like you would normally do in Minecraft). Crackers will silently gather data or, "bits" of structures and features in your render distance, and once you have around 40 of them it'll start cracking the seed automatically. The seed-cracking process takes around ~5ish minutes max.
You can open the UI and track progress (among other things) with /cracker.
Once the seed has been found you are free to copy it to your clipboard and boom! You have the entire world in your hands...
Tip: A way to expedite your cracking process is to visit the End and wander around the End Pillars. The easiest way to collect the most bits is sailing the 7 seas and finding shipwrecks.
Project description from CurseForge.
Pick your setup
Crackers by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.21
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Crackers versions and loaders
crackers-1.1.5-1.21.1.jar
11 Sept 2026
crackers-1.1.5-26.2.jar
9 Sept 2026
crackers-1.0.5-1.21-1.jar
crackers-1.0.5-1.21.1.jar
7 Aug 2026
crackers-1.0.5-26.2.jar
6 Aug 2026
Looking for an older file? The official CurseForge project page is in Resources.