Craft Slabs Back Into Blocks Mod (1.21.8, 1.20.1) – Efficient Slab Recycling for Builders

Craft Slabs Back Into Blocks Mod (1.21.8, 1.20.1) introduces a smart and practical mechanic to Minecraft that lets players convert slabs back into their original full blocks. Whether you’re a builder working with aesthetic details or a survivalist focused on resource conservation, this mod is an excellent utility to reduce waste and optimize block usage. Instead of letting leftover slabs clutter your inventory or storage, you can now reverse-craft them into usable blocks with ease.

The mod not only provides a straightforward side-by-side slab recipe, but it also supports detailed customization via a configuration file or in-game setup, giving modpack creators and advanced users full control over which slabs are reversible.

Features:

• Slab-to-Block Reverse Crafting
  Place two matching slabs side-by-side in a crafting table to recreate the original block (e.g., two smooth stone slabs = 1 smooth stone block).
• Alternative Recipe Placement
  If a vanilla recipe already uses vertical slab stacking, this mod lets you use horizontal placement to avoid recipe conflicts.
• Fully Configurable System
  Customize supported slab-to-block recipes through the slabstoblocks.json file. You can map specific slab variants to their corresponding blocks using the format:

minecraft:smooth_stone_slab, minecraft:smooth_stone

Screenshots:

Crafting Recipes:

We recommend installing Just Enough Items (for Forge-based mods) or Roughly Enough Items (for mods using the Fabric modloader) to view all available recipes in this mod.

Requires:

Minecraft Forge or Fabric API or Quilt Loader or NeoForge Installer

How to install:

How To Download & Install Mods with Minecraft Forge

How To Download & Install Fabric Mods

How To Download & Install The Quilt Loader

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Why use Craft Slabs Back Into Blocks Mod?

This mod solves a long-standing frustration in Minecraft wasted resources from leftover slabs. Whether you’re rebuilding, redesigning, or just trying to stay efficient, being able to recover blocks from slabs saves time and materials. It’s especially helpful in large-scale building projects where block counts matter and aesthetics shift frequently. For modpack creators, it adds intuitive depth without affecting balance, and its customization support ensures it fits seamlessly into any modded environment.