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StructureBlockMinecraft mod for 1.21.6

Protect structures! A mod that allows mod, modpack and datapack authors to prevent breaking and placement within structures.

server onlynewest supported release 1.21.6UtilityAdventureGame MechanicsManagement
Latest version
1.0.1-1.21.1
Minecraft
1.20.1 to 1.21.6
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
626
Updated
14 mo ago
Available on
Modrinth
Space NodeOur hosting

Host StructureBlock servers

One click and StructureBlock is installed with the right loader, on hardware built for it.

  • 1.21.6
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version StructureBlock declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.6Fabric21+declared17 Jun 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.2Fabric21+declared22 Oct 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.5Fabric21+declared23 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.3Fabric17+declared4 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023

Download

From StructureBlock’s own host. Nothing is re-hosted here.

For Minecraft 1.21.6

Choose the loader you use before downloading.

  • Fabric

    1.0.1-1.21.5 · 4 Sept 2025 · structureblock-1.0.1-1.21.5.jar

    Get Fabric

Most recently published release

1.0.1-1.21.1release4 Sept 2025

structureblock-1.0.1-1.21.1.jar · 35 KB · for 1.21.3, 1.21.2, 1.21.1, 1.21 · Fabric

Download this release
463fc4c396b6…
Older versions4
  • 1.0.1-1.21.54 Sept 20251.21.6, 1.21.5, 1.21.436 KB75 downloads85fc1254cdcc…Get
  • 1.0.0-1.21.526 Jun 20251.21.6, 1.21.5, 1.21.435 KB36 downloadsc0ccbed95cbc…Get
  • 1.0.0-1.21.x19 Apr 20251.21.3, 1.21.2, 1.21.1, 1.2135 KB75 downloads97eba0be9879…Get
  • 1.0.0-1.20.x26 Jun 20241.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more38 KB180 downloads7001916f9c17…Get

Frequently asked

Does StructureBlock work on Minecraft 1.21.6?

Yes. 1.21.6 is the newest Minecraft version StructureBlock declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does StructureBlock support?

Everything the author has declared, from 1.20.1 up to 1.21.6. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install StructureBlock on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does StructureBlock support?

Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for StructureBlock?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is StructureBlock under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install StructureBlock?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download StructureBlock safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 4 Sept 2025. We do not host files or republish descriptions. Available download links point to the author’s own release.

Not indexed yet. Score 53 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .