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CB: Compressed BlocksMinecraft mod for 1.21.5

A Block and Item Compression mod for Minecraft. Compress your Blocks and Items to make more free space (up to 3.486.784.101 Blocks / Items in just one single Block!)

client and servernewest supported 1.21.5TechnologyUtilityAdventureGame Mechanics
Latest version
1.6.2
Minecraft
1.15.2 to 1.21.5
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
MIT
Downloads
246.5k
Updated
13 mo ago
Available on
Modrinth
Space NodeOur hosting

Host CB: Compressed Blocks servers

One click and CB: Compressed Blocks is installed with the right loader, on hardware built for it.

  • 1.21.5
  • NeoForge
  • Forge
  • 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 CB: Compressed Blocks declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5NeoForge, Forge, Fabric21+declared25 Mar 2025
1.21.4Fabric, NeoForge, Forge21+declared3 Dec 2024
1.21.3Forge, NeoForge, Fabric21+declared23 Oct 2024
1.21.1Forge, NeoForge, Fabric21+declared8 Aug 2024
1.21Forge, NeoForge, Fabric21+declared13 Jun 2024
1.20.6NeoForge, Forge, Fabric21+declared29 Apr 2024
1.20.5NeoForge, Forge, Fabric21+declared23 Apr 2024
1.20.4Fabric, NeoForge, Forge17+declared7 Dec 2023
1.20.2Forge, NeoForge, Fabric17+declared20 Sept 2023
1.20.1Forge, NeoForge, Fabric17+declared12 Jun 2023
1.20NeoForge, Fabric, Forge17+declared2 Jun 2023
1.19.4Forge, Fabric, NeoForge17+declared14 Mar 2023
1.19.3NeoForge, Forge, Fabric17+declared7 Dec 2022
1.19.2Fabric, NeoForge, Forge17+declared5 Aug 2022
1.19.1Forge, NeoForge, Fabric17+declared27 Jul 2022
1.19Forge, NeoForge, Fabric17+declared7 Jun 2022
1.18.2Forge, NeoForge, Fabric17+declared28 Feb 2022
1.18.1Forge, NeoForge, Fabric17+declared10 Dec 2021
1.18Forge, NeoForge, Fabric17+declared30 Nov 2021
1.17.1Forge, NeoForge, Fabric16+declared6 Jul 2021
1.17Forge, NeoForge, Fabric16+declared8 Jun 2021
1.16.5Forge, NeoForge, Fabric8+declared14 Jan 2021
1.15.2Forge, NeoForge, Fabric8+declared17 Jan 2020

Download

From CB: Compressed Blocks’s own host. Nothing is re-hosted here.

1.6.2release19 Aug 2025

compressedblocks-fabric-1.20.2-1.6.2-1.20.2.jar · 14.4 MB · for 1.20, 1.20.1, 1.20.2

Download latest
e2cb6fa2e56e…
Older versions23
  • 1.8.3-1.21.410 Aug 20251.21.3, 1.21.4, 1.21.514.8 MB166 downloadsf0329dab0c42…Get
  • 1.8.2-1.21.428 Mar 20251.21.4, 1.21.513.6 MB172 downloads61752c413296…Get
  • 1.7.2-1.21.128 Mar 20251.21, 1.21.114.8 MB402 downloads7d1302d35176…Get
  • 1.8.1-1.21.427 Mar 20251.21.414.1 MB76 downloadscf3ef110c77d…Get
  • 1.7.1-1.218 Feb 20251.21, 1.21.114.1 MB4.3k downloads278a6b449a4e…Get
  • 1.8.0-1.21.43 Feb 20251.21.414.1 MB116 downloadsa9f40d9abeb3…Get
  • 1.7.0-1.21.023 Jul 20241.21, 1.21.114.1 MB7.2k downloads0c8b1925b94e…Get
  • 1.6.1-1.20.611 Jun 20241.20.5, 1.20.614.1 MB384 downloads1b8dc86cd8ba…Get
  • 1.6.1-1.20.411 Jun 20241.20.414.2 MB428 downloads7713d6259193…Get
  • 1.6.1-1.20.211 Jun 20241.20, 1.20.1, 1.20.214.6 MB32.4k downloads11f65de1baaf…Get
  • 1.6.1-1.19.411 Jun 20241.19.3, 1.19.414.3 MB418 downloadsac6bd2cb3ed3…Get
  • 1.6.1-1.19.211 Jun 20241.19, 1.19.1, 1.19.214.2 MB1.0k downloadse4f288c52f7a…Get
  • 1.6.1-1.18.211 Jun 20241.18, 1.18.1, 1.18.213.9 MB588 downloadsef38be07e9e4…Get
  • 1.6.1-1.17.111 Jun 20241.17, 1.17.116.3 MB258 downloadsadb8f81fc4a3…Get
  • 1.6.0-1.20.410 Jun 20241.20.414.2 MB288 downloadsc4cacf6c2800…Get
  • 1.6.0-1.19.210 Jun 20241.19, 1.19.1, 1.19.214.2 MB169 downloads9ee4b01a78ca…Get
  • 1.6.0-1.20.210 Jun 20241.20, 1.20.1, 1.20.214.6 MB240 downloads547bd07e29b2…Get
  • 1.6.0-1.19.410 Jun 20241.19.3, 1.19.414.3 MB101 downloads5d45b5aa27c9…Get
  • 1.6.0-1.18.210 Jun 20241.18, 1.18.1, 1.18.213.9 MB84 downloads6736b44043ac…Get
  • 1.6.0-1.17.110 Jun 20241.17, 1.17.116.3 MB123 downloads6f0cc96d5c7b…Get
  • 1.5.211 May 20241.20, 1.20.1, 1.20.214.6 MB1.2k downloads3facbf0a71eb…Get
  • 1.5.11 May 20241.20.5, 1.20.614.1 MB289 downloadsd2b033767ad7…Get
  • 1.5.028 Apr 20241.20, 1.20.1, 1.20.214.4 MB173 downloads9a520d920dad…Get

Frequently asked

Does CB: Compressed Blocks work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version CB: Compressed Blocks 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 CB: Compressed Blocks support?

Everything the author has declared, from 1.15.2 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install CB: Compressed Blocks on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does CB: Compressed Blocks support?

NeoForge, Forge, 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 CB: Compressed Blocks?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is CB: Compressed Blocks 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 CB: Compressed Blocks?

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 CB: Compressed Blocks 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. The download link goes to the source recorded for that release; verify the publisher, filename and 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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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .