Why does my text seed become a different number in Minecraft?

Minecraft Java Edition converts string seeds using Java's String.hashCode() algorithm, which produces a 32-bit signed integer. This tool replicates that conversion exactly, so you can see the numeric value Minecraft will use internally.

Does Bedrock Edition use the same seed numbers as Java Edition?

Modern Java 1.18.2+ and Bedrock 1.18.30+ accept signed 64-bit numeric seeds. Reusing the same number can broadly align terrain and biomes, but structures, decorators, carver caves, and mob spawning can differ. This is not a world converter.

Can I use negative seed numbers in Minecraft?

Yes. Minecraft accepts negative seed values. You can type a negative number directly in the in-game seed field. String.hashCode() frequently produces negative numbers, which is normal.

What is the range of valid Minecraft seed values?

Modern Java and Bedrock support signed 64-bit integers (-2^63 to 2^63-1). Entering text in Java hashes it to a signed 32-bit integer. A numeric-looking value outside the signed 64-bit range also follows Java's text-hash fallback.

Does this tool send my seed to a server?

No. All computation runs locally in your browser using JavaScript. Nothing is transmitted or stored.

Minecraft Seed Info

Convert a Java text seed to its signed 32-bit hash, inspect signed 64-bit numeric seeds, and copy the value for modern Java or Bedrock.

Seed Converter

Enter a word, phrase, or number

Enter a seed above to see its properties

Using Seeds in Minecraft

Java Edition

Go to Singleplayer → Create New World → More World Options
Paste the seed into the Seed for the World Generator field
Text seeds are auto-converted to numbers internally
Entering the numeric value directly gives the same world
Seeds are version-sensitive — terrain changed in 1.18

Bedrock Edition

Go to Play → Create New → Advanced
Enter the seed in the Seed field
Supports signed 64-bit numeric seeds since 1.18.30
Use the copied number, especially when the source is a Java text seed
Terrain may broadly align; structures, local features, caves, and mobs can differ

Copied!

Summary

Convert a Java text seed to its signed 32-bit hash, inspect signed 64-bit numeric seeds, and copy the value for modern Java or Bedrock.

How it works

Type or paste a seed string or number into the input field.
For string seeds, the tool applies Java's String.hashCode() algorithm to produce a 32-bit signed integer, matching how Minecraft Java Edition converts text seeds.
The numeric seed, its hex equivalent, sign, and other properties are displayed immediately.
For modern cross-edition use, copy the numeric result rather than assuming the same text phrase is interpreted identically.
Use the Copy button to grab the numeric seed value for use in-game.

Use cases

Verify what numeric value a word or phrase seed maps to before using it in-game.
Reuse a signed 64-bit numeric seed in modern Java or Bedrock while accounting for edition differences.
Inspect the exact two's-complement hexadecimal and binary representation.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu