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Every Random Chunk

by Spideyy_OG

Every Random Chunk turns each new chunk a player enters into a random block pattern, on servers running Fabric, with the change kept for the world.

FabricServer-side onlyMIT License1.21.11

What it does

When a player enters a chunk for the first time, its non-air blocks are replaced with one block picked at random from a configurable pool. A chunk can end up entirely of diamond blocks, entirely of slime, or as a single ticking TNT block, so each area is different on arrival. Because the change is applied once and stored, the altered terrain stays that way for the rest of the world.

The mod is server-side only, so only the server needs it and players join without installing anything. Weights for each block type can be adjusted, certain blocks can be disabled, and the behavior is set in everychunkrandom.json in the server config folder. Installation needs Fabric; files are published for Fabric only, with the MIT License covering the code, which is not open source. Builds target 1.21.11 only.

Key features

  1. Chunk-wide randomization

    Entering a new chunk replaces its non-air blocks with one randomly chosen block from the configured pool.

  2. Chest and portal protection

    Loot chests, barrels, spawners and End portal and frame blocks are kept in place, so progress toward the game's goals is not blocked.

  3. Bedrock preservation

    Bedrock is kept in place by default so players cannot drop into the void, and a setting turns that protection off.

  4. Chain reactions

    Nearby chunks may be converted into redstone or lava blocks, and those changes can start a series of reactions in sequence.

  5. Weighted block pool

    Each block type's frequency can be weighted, and specific blocks can be disabled to shape how common each pattern is.

Compatibility

Latest build for each game version and loader.

1.21.111.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Random Layer Chunk is also server-side only and open source under the MIT License, but it targets 1.21.1 instead of 1.21.11. Random Block Chunk runs on client and server and is published for 1.21.10, and it is not open source. Random Block Chunks is server-side only and open source, with files for 1.20 – 1.20.1.

ModLoadersGame versionsEnvironmentUpdated
Every Random ChunkFabric1.21.11Server-side only2026-07-06
Random Layer ChunkFabric1.21.1Server-side only2026-08-10
Random Block ChunkFabric1.21.10Client and server2025-11-26
Random Block ChunksFabric1.20 – 1.20.1Server-side only2025-09-13

Questions

Does Every Random Chunk need Fabric API?

No required dependency is listed for Fabric.

Does the server need Every Random Chunk installed for players to join?

Yes, the server must run it. The mod is server-side only, so players can join without installing it.

Can a chunk's randomized blocks be reset?

Yes. The randomchunk reset command re-randomizes the current chunk, and randomchunk reset with coordinates targets a specific chunk.

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What the author says

Ever wanted to play Minecraft, but every time you step into a new area, the world changes entirely? Every Chunk Is Random Blocks transforms your survival experience by permanently converting entire chunks into a single, randomly chosen block when they're first discovered or entered by players! One chunk might be…
Spideyy_OG, on the Modrinth page

Official listing

Owner
Spideyy_OG
Published
2026-07-06
Updated on Modrinth
2026-07-06
Facts verified
2026-10-15
Open on ModrinthCompare