Block Compressors

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Block Compressors
Block compressors.png
Module TypeReliant
Created bySparks
Last Updated bySunderB, Misode
Required ModulesCustom Crafters
Compatible MC Versions1.15

This module allows you to compress stacks of items into a single item for better storage.



The Block Compressor is an upgrade to a Custom Crafter that transforms it into a machine that compresses and decompresses items on top of it. This module requires the Custom Crafters module to be installed to work correctly.

Items can be compressed by a factor of 64 or 16, meaning that a single "64 compressed stick" is made from 64 regular sticks. Compressed items enable containers like chests and shulker boxes to hold vastly greater quantities of items.

Compressed items can easily be decompressed back into their original state to be used in crafting and building. Be careful though, if a compressed item is placed as a block it will lose its compressed state. For example, if a *64 compressed diamond block is placed on the ground, 63 diamond blocks will have just been lost.

A Block Compressor


Insert the recipe below into a Custom Crafter to upgrade it into a Block Compressor. When broken, the Block Compressor will drop both the items used to create a Custom Crafter and the items used to upgrade it into a Block Compressor.

Custom Crafter

Compressor block model.png

Compressing and Decompressing

The GUI of a Block Compressor is used as a settings interface for the type of compression it will do. A Block Compressor has 3 modes. It can compress *16, compress *64, or decompress.

Compressor Mode Items inside Compressor
Compress *64 64 of any item into any slot
Compress *16 16 of any item into any slot
Decompress 1 of any item into any slot

Once compression mode is set, throw items on-top of the Compressor to compress/decompress them.

Compression Process

Technical Details

A chest full of *64 compressed items can hold a total of 110,592 items, 6400% more than a chest of uncompressed items (1728 items).

A chest full of shulker boxes, each full of *64 compressed items, can hold 2,985,984 items.


Advancement Description Requirement
Clever Crushing Make yourself a Block Compressor Create a Block Compressor

Learn More and Download

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Version Date Change
1.9-1.10 03 Feb 2016 Released Block Compressors
1.11 10 Jun 2017 Updated for 1.11 command format
1.12 10 Jun 2017 Updated for 1.12 command format
1.13 08 Dec 2018 Updated for 1.13 data packs
1.14 10 Jul 2019 Fixed an issue of nbt being lost when compressing
17 Jul 2019 Patched a duplication exploit resulting from decompressing

items that were compressed before the 1.14 module update

1.15 26 Dec 2019 Updated for 1.15 base module