Describe your mod in plain English. StackNest writes full Fabric API code, compiles it server-side, and hands you a working .jar — ready for Fabric 1.21+.
Free tier · No credit card · Fabric 1.21+ · Mixins supported
StackNest knows the Fabric API — registries, events, networking, mixins, and the loom build system.
Write what you want in plain English. Mention custom items, blocks, commands, world generation, vanilla behaviour changes via Mixin, or any Fabric API feature.
A specialised model generates all Java classes, fabric.mod.json, build.gradle, and any required mixin config — all targeting the correct Fabric API version for the requested Minecraft version.
StackNest builds the mod using Gradle and Fabric Loom server-side. On compile errors, it runs up to 5 automatic fix passes until the mod builds cleanly.
You get a compiled .jar ready for your Fabric installation, plus the full source. No local toolchain needed.
Every Fabric feature you'd write by hand — generated, compiled, and validated automatically.
Brigadier command registration via FabricAPI's CommandRegistrationCallback, with arguments, suggestions, permission level checks, and server-side execution.
Registry.register calls, Item and Block subclasses, model JSON files, lang entries, and correct fabric.mod.json entrypoint setup.
@Inject, @Overwrite, and @Redirect mixins to modify vanilla Minecraft classes — correctly configured in mixins.json and referenced in fabric.mod.json.
ServerLifecycleEvents, PlayerBlockBreakEvents, AttackEntityCallback, UseEntityCallback, and more — registered with the correct Fabric event API.
Custom packet registration with ServerPlayNetworking and ClientPlayNetworking, payload records, and correctly registered channels.
Custom biomes, structure features, ore generation via FabricBiomeModifications — with correctly set up JSON data files and Codec serialisation.
Real mod descriptions that StackNest can build for you instantly.
StackNest targets the latest stable versions and common Fabric dependencies.
A Fabric mod generator creates custom mods for Fabric modloader. AI-powered tools like StackNest handle writing the Java source with the Fabric API, compiling it with Gradle and Fabric Loom, and packaging it as a ready-to-use .jar — no Java or Gradle experience needed.
StackNest defaults to the latest stable Fabric API for Minecraft 1.21.4. You can request a specific Minecraft/Fabric API version in your prompt and the build.gradle will be updated accordingly.
Yes. StackNest can generate Mixin classes to inject into or modify vanilla Minecraft code. Describe what vanilla behaviour you want to change and the generator writes the correct @Inject, @Overwrite, or @Redirect mixin with proper mixins.json configuration.
Yes. StackNest uses the Fabric registry system to register custom items and blocks, generates model JSON and lang file entries, and sets up correct entrypoints in fabric.mod.json.
No. StackNest compiles the mod on its own servers using Gradle and the Fabric Loom toolchain. You just download the finished .jar and drop it into your mods/ folder alongside the Fabric Loader.
Free to start. No credit card. Your first mod in under a minute.
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