Seed Tools
Generate random Minecraft seeds or convert a text seed to the exact number Java Edition uses.
Text to seed
Exactly what you’d type in the Seed field or level-seed.
level-seed=108181935
Seed: [108181935]
Random seeds
Signed 64-bit, like the game makes
How Java Edition reads a seed
If the seed is a whole number between -9,223,372,036,854,775,808 and 9,223,372,036,854,775,807, it is used as is. Anything else, including numbers that are too big, is treated as text and turned into a number with Java’s String.hashCode(). That only gives about 4.3 billion possible values, so text seeds cover a much smaller range than numeric ones.
Text seeds are case-sensitive: Glacier and glacier are different worlds. An empty seed field gives a random world.
Bedrock Edition
Bedrock handles seeds differently, so the numbers here are for Java Edition. The random generator uses your browser’s cryptographic random source.
ZCraft Studios
Ready-made configs for your plugins
Configs for popular plugins, with setup docs, changelogs and support on Discord.