Fabric → NeoForge · Minecraft 1.21.1 and 1.21.11 · open source
Drop a Minecraft mod JAR on a web page; get the same mod back for another loader, with a proof that it behaves the same.
Jarrow will convert the JAR itself, not shim it at runtime, and it will only call a conversion good when a behaviour harness says so.
The converter is not built yet (milestone M3).
Nothing converts yet. This page gets a drop zone when the converter works in the browser, and not before: a drop zone that did nothing would be a lie. Follow the build on the roadmap.
How it will work
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Drop a Fabric mod JAR. The page reads its manifest and sorts it into a tier: Tier A, Tier B or Unsupported.
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Tier A converts in your browser, so the JAR never leaves your machine. Tier B runs as a short-lived GitHub Actions job for signed-in users.
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A parity harness starts the original on Fabric and the result on NeoForge and compares what each server registers. That comparison, not a compiler, decides green, yellow or red.
Nightly board
0 mods on the board
The first nightly has not run yet.