CB: Compressed Blocks
by Sashiro
CB: Compressed Blocks stores blocks and items in multi-level compressed forms, so a large stack of material fits into a single placeable block or a crate.
What it does
Blocks are compressed into compact, placeable variants, and items can be stored in crates to reduce inventory use. Each compression level can be compressed again, and the highest level can stand for several billion original blocks or items in one placeable block. Decompression returns the original blocks and items from any level.
Two recipes are available: a standard 3×3 compression and a smaller 2×2 compression for materials that already craft in a 3×3 grid. The compression catalog can be extended with custom entries and resource-pack assets, and a custom entry that reuses an existing ID replaces the built-in definition. Fabric API is required on Fabric, and Forge Config API Port is required on Forge. Mod Menu is optional.
The mod runs on Fabric, Forge and NeoForge across 29 release versions, 1.15.2 – 1.21.11, and is published as MIT License open source software. Both the server and every player need it. Forge reads its settings from the JSONC catalogs, while NeoForge and the newest Fabric builds store settings in loader configuration files that take precedence over the JSONC defaults.
Key features
Block compression
Blocks are compressed into compact variants that remain placeable in the world.
Item storage in crates
Compressed items are kept in crates, which reduces the inventory space that a large quantity takes.
Multiple compression levels
Compressed variants can be compressed again, reaching higher levels with larger quantities per block.
Two compression recipes
A 3×3 recipe and a 2×2 recipe cover materials that already craft in a 3×3 grid.
Decompression
Reversing the process recovers the original blocks and items from a compressed variant.
Custom compression entries
Entries added with a new ID extend the system, and entries that reuse an existing ID replace the built-in definition.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
1.20.x6 of 6 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x1 of 1 version with builds
1.15.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Optional 1
Use cases
Storing bulk materials
Large quantities of a block or item can be kept in a few compressed forms instead of many full stacks.
Who it’s for: Players who run out of inventory or storage space in large survival worlds, and modpack developers who want to add blocks and items from other mods to the compression system without dedicated integration.
How it compares
Compression is a Fabric and NeoForge mod with files for 1.21.8 – 1.21.11, released under the Creative Commons Attribution Non Commercial Share Alike 4.0 license and not open source. Create Compressed is a Forge and NeoForge mod for 1.15.2 – 1.21.1, under All rights reserved and not open source. Resource Compression is open source under the MIT License and runs on Fabric and Quilt for 1.20.1 – 1.20.2, so it does not cover Forge or NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| CB: Compressed Blocks | Fabric, Forge and NeoForge | 1.15.2 – 1.21.11 | Client and server | 2026-10-14 |
| Compression | Fabric and NeoForge | 1.21.8 – 1.21.11 | Client and server | 2026-01-25 |
| Create Compressed | Forge and NeoForge | 1.15.2 – 1.21.1 | Client and server | 2025-03-01 |
| Resource Compression | Fabric and Quilt | 1.20.1 – 1.20.2 | Client and server | 2023-10-21 |
Questions
Does CB: Compressed Blocks need Fabric API?
Does the server need CB: Compressed Blocks?
How are compression settings changed on NeoForge or Fabric?
In the catalog
CB: Compressed Blocks is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Sashiro
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What the author says
CB: Compressed Blocks adds multi-level compression for blocks and items, letting you store large quantities in a fraction of the space. Compressed blocks remain placeable, while compressed items can be stored in crates for compact inventory storage. A single maximum-level compressed variant can represent up to…
Official listing
- Modrinth page
- modrinth.com/mod/cb-compressed-blocks
- Owner
- Sashiro
- Published
- 2022-11-19
- Updated on Modrinth
- 2026-10-14
- Facts verified
- 2026-10-15