DatapacksJava
Back to Blocks
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Turn any slabs, stairs, walls or carpets back into their block variants:
Slabs: 2 slabs vertically for 1 block
Stairs: 4 stairs in a square for 3 blocks
Walls: 4 walls in a square for 3 blocks
Carpets: 3 carpets vertically for 1 block
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.4, 1.21.5, 1.21.6
- 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 — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as backtoblocks-1.0.0-datapack-1.21.10.zip
- Download size: 111 KB
- Download link checked 5 Sept 2026 — working
These come from our own check of the pack file, not from the source page.