This is an unofficial backport of LazyDFU for Legacy Fabric, specifically Minecraft versions 1.13.x
LazyDFU is an optimization mod for Minecraft that defers unnecessary initialization work so that it is only performed if required. Specifically, it makes the initialization of DataFixerUpper "lazy" - that is, it will not immediately create the rules required to migrate data from older versions of Minecraft to newer versions until it actually needs to do so.
The code of this backport is the same as LazyDFU 0.1.2, adjusted to legacy mappings.
For more information about how LazyDFU works, check out the official LazyDFU modrinth page, containing the 1.14+ releases, also consider supporting astei, the original creator of LazyDFU!
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.13, 1.13.1, 1.13.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as lazydfu-0.1.2-1.13.2.jar — drop this file into the mods folder
- Download size: 16 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.