Testworld
1K, 1.21.5+, Grassland
Fly the terrain, caves, and marked structures.
Overview
Very grand test landscape
Size
1K Footprint
1,025 × 1,025
blocks, 1.1 km² at one block per metre
Edge to edge
- Happy ghast 5 min
- On foot 4 min
- Minecart 2 min
- Horse 2 min
- Elytra 30 s
Walking, a minecart on powered rails, an average horse and rocket-boosted elytra.
Sizes in the library 1% smaller than this
Most worlds are 4K (87 of them). The largest is MCS SMP Season 3 Server Map #S3 at 9K.
Biome composition
Shares are measured across the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so biomes missing from this list can still be found out there.
Land 54.9% of map
-
Plains 89.4% -
Stony Shore 4.9% -
Beach 3.7% -
Forest 2.0%
Water 45.1% of map
-
Ocean 93.0% -
River 7.0%
Caves
What this world's caves are made of, by volume, measured from the save in 4 block cells.
- Normal Caves 99.2%
- Magma Caves 0.7%
Inferred. These have no biome of their own in Minecraft, so they are named from the blocks around the cave rather than read from the save.
Structure coverage
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so structures not confirmed here can still generate out there.
Surface 0/7 confirmed
- Desert pyramids Not checked
- Igloos Not checked
- Jungle pyramids Not checked
- Pillager outposts Not checked
- Swamp huts Not checked
- Trail ruins Searched, not found
- Woodland mansions Not checked
Underground 4/6 confirmed
- Amethyst geodes Included
- Ancient cities Missing
- Dungeons / monster rooms Included
- Mineshafts Included
- Strongholds Missing
- Trial chambers Included
Ocean 3/4 confirmed
- Buried treasure Searched, not found
- Ocean monuments Included
- Ocean ruins Included
- Shipwrecks Included
Portal structures 1/1 confirmed
- Ruined portals Included
Settlements 0/1 confirmed
- Villages Not checked
Loot tables
Which of the game's loot tables can turn up on this map, read from the world's own files. Confirmed means the scan found the table itself; not observed means the structure carrying it was not seen in this export.
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so tables not seen here can still turn up out there.
Chest loot 7/20 confirmed
- Abandoned mineshaft Included
- Buried treasure chest Not observed
- Desert pyramid Not observed
- End City treasure Not observed
- Igloo chest Not observed
- Jungle temple Not observed
- Jungle temple dispenser Not observed
- Nether fortress bridge Not observed
- Pillager outpost Not observed
- Shipwreck map Included
- Shipwreck supply Included
- Shipwreck treasure Included
- Simple dungeon Included
- Spawn bonus chest Not observed
- Stronghold corridor Not observed
- Stronghold crossing Not observed
- Stronghold library Not observed
- Underwater ruin (big) Included
- Underwater ruin (small) Included
- Woodland mansion Not observed
Village chest loot 0/15 confirmed
- Village armorer Not observed
- Village butcher Not observed
- Village cartographer Not observed
- Village desert house Not observed
- Village fisher Not observed
- Village fletcher Not observed
- Village mason Not observed
- Village plains house Not observed
- Village savanna house Not observed
- Village snowy house Not observed
- Village taiga house Not observed
- Village tannery Not observed
- Village temple Not observed
- Village toolsmith Not observed
- Village weaponsmith Not observed
Archaeology 1/1 confirmed
- Archaeology loot Included
Structure loot 1/1 confirmed
- Trial chamber loot Included
What’s included in Testworld?
See what this Minecraft world contains. Results combine MCA Selector findings, chunk data, level.dat, and manually placed structure pins.
Beta edition: some results are still being verified.
- Seed
- Unknown
- World type
- Unknown
DETAILED INVENTORY Explore the world contents
Search and filter the registries found in this world.
Open the inventory Close the inventory
Explore the world contents
Search and filter the registries found in this world.
Biomes
Biome types found in the existing Overworld.
Structures
StructuresSurface and underground structure types evidenced by existing starts or reviewed markers.
Loot types
Loot typesLoot families evidenced by existing loot-table references.
Animals
AnimalsAnimal types observed in the existing world.
Blocks
BlocksReference inventory only. Missing crafted or dimension-specific IDs are not automatically survival failures.
Cave biomes
Cave biomesAvailable cave biomes found in the existing Overworld.
Key compatibility details
The most relevant survival features, grouped by category.
No features match these filters.
This report inventories existing save data without loading, generating, or changing chunks. Vanilla terrain may still generate beyond the existing map boundary.
Inspect the world data
The world settings Minecraft stores in level.dat, as captured when this world was scanned. Read only, and player data is never published.
No fields match that search.
Questions about Testworld
- What is Testworld?
-
Testworld is a hand-made survival world of 1,025 × 1,025 blocks, made with WorldPainter, World Machine, Gaea, Axiom and WorldEdit, built for Minecraft Java 1.21.5. You download the world folder and play it like any other save, in singleplayer or on your own server.
- How big is Testworld?
-
1,025 × 1,025 blocks, so about 1 million blocks of surface. Walking from one edge to the other takes roughly 4 minutes at normal walking speed. The terrain runs from Y -64 to Y 320.
Outside that area the world keeps generating normal vanilla Minecraft chunks, so you never hit a wall, you just leave the built part behind.
- Which Minecraft version does Testworld need?
-
Testworld is built for Minecraft Java 1.21.5. Newer releases normally open it fine. Opening it in an older release is not supported: blocks and structures added after that version cannot load, and the world can be damaged by the attempt.
Bedrock players need a converted copy. See the Bedrock notes in the FAQ.
- Which biomes are in Testworld?
-
6 in total. The land is mostly Plains (89.4%), Stony Shore (4.9%), Beach (3.7%) and Forest (2.0%), counted as shares of the land rather than of the whole map.
Water covers 45.1% of the map, and land 54.9%.
By volume this world's caves are Normal Caves (99.2%) and Magma Caves (0.7%). The cave breakdown has the rest.
The full breakdown is further up this page, with every biome and its share.
- Which structures are in Testworld?
-
8 of the 19 structure types the scan checks are confirmed present: surface (0/7), underground (4/6), ocean (3/4), portal structures (1/1) and settlements (0/1).
Not confirmed: Desert pyramids (not checked), Igloos (not checked), Jungle pyramids (not checked), Pillager outposts (not checked), Swamp huts (not checked) and Trail ruins (searched, not found). "Searched, not found" means the scan looked and came up empty; "not checked" means it has not been looked for yet.
The structure list above names every one of them.
- Is Testworld ready to play in survival?
-
Yes. A scan of the world file confirms biomes, structures, ores, plants, animals, loot and caves, so the survival loop works from the first night: you can mine, farm, breed and loot without adding anything.
The world contents report at the bottom of this page holds the item-by-item detail.
- Can I look at Testworld before downloading it?
-
Yes. Open it in the 3D explorer and fly the real terrain in your browser, with the biomes, the caves and the marked structures. Nothing to install.
How do I install Testworld on Java Edition?
- Unpack the archive you downloaded.
- Open your saves folder. On Windows press
Win+Rand enter%appdata%\.minecraft\saves. On macOS it is~/Library/Application Support/minecraft/saves, on Linux~/.minecraft/saves. - Move the unpacked folder in. It must be the folder that contains
level.dat, not a folder wrapping it. - Restart Minecraft on 1.21.5 or newer and pick the world in singleplayer.
Can I play it on Bedrock, or on a server?
Bedrock needs a converted .mcworld copy, and converted worlds carry their own
quirks around spawn, chests and villagers.
For a server, drop the world folder in as the server's world and start it.
What may I do with it?
The worlds are released under CC BY 4.0. The Rights panel on this page lists what that allows and how to credit it.