ModsFinder

Seed Checker

by Scribble

Seed Checker is a Fabric utility for trying world seeds in turn, so a player can compare generated worlds without typing each seed by hand.

FabricClient and serverMIT LicenseOpen source1.21.8

What it does

A seed list is kept in a text file, one seed per line, and the tool reads it to create a world from the first seed. Pressing O while the tool is active generates the next world from the file, which speeds up checking many seeds in a row. Saved lists can be reloaded at any time.

Seed Checker targets 1.21.8 on Fabric and needs Fabric API. Installation covers the server and each player's game. Its source code and issue tracker are public.

Key features

  1. Seed list file

    Seeds are written into a text editor file, one per line, and loaded from there instead of typed into the create-world screen.

  2. Next seed on a key press

    Pressing O generates a world from the next seed in the list, so checking a sequence takes one keystroke per world.

  3. Saved lists

    A seed list can be saved and loaded again, so a set of candidates can be reused across sessions.

Compatibility

Latest build for each game version and loader.

1.21.81.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

How it compares

Full comparison

NameSeed is a Fabric mod for 1.21.1 with the same client and server environment, but it is released under All rights reserved and is not open source. LastSeen is open source under the MIT License and runs on the server alone for 1.21 – 1.21.1, so players need nothing installed.

ModLoadersGame versionsEnvironmentUpdated
Seed CheckerFabric1.21.8Client and server2025-10-03
NameSeedFabric1.21.1Client and server2026-07-24
LastSeenFabric1.21 – 1.21.1Server-side only2024-08-10

Questions

Does Seed Checker need Fabric API?

Yes. Fabric API is the required dependency and must be installed alongside Seed Checker on Fabric for 1.21.8.

In the catalog

Seed Checker is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 17,695 mods support Minecraft 1.21.8.

Utility mods36,990Fabric modsMods for 1.21.817,695

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What the author says

This tool speeds up the process by allowing you to quickly generate worlds with the specified seeds Now you should load into a world and it will have the first seed that you specified in the file
Scribble, on the Modrinth page

Official listing

Owner
Scribble
Published
2025-10-03
Updated on Modrinth
2025-10-03
Facts verified
2026-10-15

Tags

Utility
Open on ModrinthCompare