What is random seed generator?
Many games and programs build worlds, maps or random events from a seed. The same seed always creates the same result, so players share seeds to share worlds, and developers use them to repeat tests.
This generator makes seeds in the formats people use most. A 64 bit number matches the seeds used by Minecraft style games. Hex and word seeds are handy for code and for seeds that are easy to share.
How to use the random seed generator
- Choose the seed type.
- Set how many seeds you want.
- Press Generate, copy a seed and paste it into your game or program.
How the random seed generator works
Number seeds are built from two random 32 bit values joined into a 64 bit value, then shown as signed or unsigned. Hex seeds are 16 random hex digits. Word seeds join random words with a number from 100 to 999.
Worked example
Common uses of the random seed generator
- Starting a new Minecraft style survival world.
- Creating repeatable maps for a game jam or prototype.
- Seeding a simulation, test or machine learning run.
- Sharing a challenge world with friends.
- Testing procedural generation code.
Tips and common mistakes
Write down the seed of any world you like. It cannot be recovered afterwards.
Different game versions can build different worlds from the same seed, so note the version too.
Background: what to know before you rely on it
Computers cannot produce true randomness from nothing, so most programs use a pseudo random number generator. It starts from a seed and follows a fixed formula to produce a long sequence that looks random. Because the formula is fixed, the same seed always produces the same sequence. This is a feature. Game worlds can be recreated from a single number, scientists can repeat experiments and developers can reproduce bugs. For security uses, such as keys, seeds must come from an unpredictable source. For games, any number works, and sharing a seed is a social tool: communities swap seeds for scenic starts, rare resources and fun challenges.
Private, free and fast
This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all name and id generators, or browse the full list of tools.
Frequently asked questions
What is a seed in a game?
A starting number for the random generator that builds the world.
Do I need a specific range?
Minecraft style games accept 64 bit signed numbers. Others may use smaller ranges.
Is each seed unique?
Practically yes for 64 bit values.
Can a word seed be used in a game?
Some games hash text into a number. Others need a numeric seed.
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