How is this different from the main island seeds page?

These seeds are computed for Java 1.20. The main island seeds list targets Java 26.3. Match the version on the card; older versions can generate different biomes and structure positions.

Which releases do these seeds work on?

The whole 1.20 line — 1.20 through 1.20.6, including 1.20.1 modpacks: biomes, terrain and structure positions are identical across the patches. (The one generation change, 1.20.2 making diamond ore more common in the deepslate layers, doesn't move anything on these cards.) On 1.21+ the same seed generates almost the same world, but trial chambers (1.21) and pale gardens (1.21.4) appear and a few placements shift, so use our main lists for current versions.

Do these seeds work on Bedrock Edition?

No — Java and Bedrock generate different worlds from the same seed. These lists are Java Edition only.

Best 1.20 Survival Island Seeds

Land starts surrounded by at least 80% sampled ocean within 400 blocks. Compare the coast and check starting-island trees before playing.

Java Edition 1.20 · 50 seeds checked against category criteria

These seeds use Java 1.20 (Trails & Tales) generation. Browse all 1.20 categories →

Choose your starting world

Use the map to compare the surrounding coast, then check the starting-island tree report. A nearby structure marker may be underwater or on another island.

Every seed meets this rule: Estimated spawn is on land, with ocean biomes at 80% or more of the sampled points within 400 blocks.

Before you create the world

Ocean share is sampled, not a measurement of the exact coastline. Narrow land bridges may be missed. Biome colors do not confirm trees, supplies or a playable survival start.

Computed for Java 1.20. Spawn is estimated, surface biomes are sampled at Y 63, and structure markers are predictions. Use default world generation and confirm important locations in-game.

A few places to start

Picks from this list, selected by recorded distances. Map previews show biome predictions.

Ocean-focused start
#1 · -2698553384061941869
A top-ranked ocean-focused pick from this catalog. Tree availability needs a separate in-game check.
Explore seed →
Village nearby
#46 · -8297675963253503077
Structure predicted 101 blocks from estimated spawn · X 320, Z 368
Explore seed →
Ruined portal nearby
#18 · -50644143129541040
Structure predicted 48 blocks from estimated spawn · X -528, Z 384
Explore seed →

More starts: Mushroom islands · Shipwreck starts. Search your own conditions →

All 50 seeds for Java 1.20

Looking for a no-tree survival challenge? Check “Starting island trees” on each card. “Not verified” means tree cover has not been checked in-game for this version. Biome maps do not confirm individual trees. Treeless islands may still have wood in structures.

Also has nearby

Choose your starting world

Before you create the world

A few places to start

All 50 seeds for Java 1.20

-2698553384061941869

647468435707476623

1188653222203147276

8529009853885482898

7520968149336687681

-8255328208231456897

2540342458440586440

-8440118187734631803

5314954770218946031

8486382720509950512

-8125342981177501739

-6066719455950365197

-7416118930140481503

4044466896616201942

-4164268232718277120

-6990738764266475689

-5935946404355270079

-50644143129541040

7599215174541073819

6847067256082907206

-5791310039759323634

-1347804974983871548

-8201504769206844827

6221561428793958132

-8634396969499298892

-2706682801210873079

-7376928053725243664

2395716932955564072

-397839476142834141

9021900367023121723

-8087829132388367663

8048099579098678133

6353225303753362818

-3816603181736985849

-1991405943743881910

835455410170906611

4896006738966610875

5911923215565408782

9194494261890354082

-6405405554351899274

-368777146362310008

-993306800821017874

711545243791006171

-662892960641821047

6465837811511645946

-8297675963253503077

-1752101382465881177

142176726600828388

-8359665032276246526

-5642095948839766205

About these 1.20 seeds

Frequently asked questions