Mamelao's seedchecker
by mamelao
Mamelao's seedchecker lets players cycle through predefined Minecraft seeds with hotkeys, so seed checking runs faster before a world loads.
What it does
Players load a list of seeds and the mod steps through them one at a time with a click or a hotkey. Each seed is read from seeds.txt, and a seed is removed from the file once it has been tested. Commands can be queued so that they run automatically when a world is entered, which suits speedrunning workflows that repeat the same checks.
Worlds can be loaded in the background ahead of time, so the wait for each load is reduced. A HUD overlay shows useful information during a check, and a block counter reports how many blocks of a chosen kind appear around the player's view, for example in buildings. The mod runs on Fabric for 1.19.4 only and is client-side only, so servers do not need it. It is released under the MIT License and is open source.
Key features
Seed list cycling
Seeds from a list are loaded in turn, with a hotkey or click advancing to the next one.
Queued commands
Commands can be set to run automatically after a world is entered, for repeatable test routines.
Background world loading
Worlds are prepared in the background, which cuts the time spent waiting for each seed to load.
Block counter and HUD
A counter reports blocks of a chosen type near the view, and a HUD displays information during checks.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Speedrun seed selection
Players testing many candidate seeds for a route can step through a prepared list without manual searching.
Who it’s for: Speedrunners and players who compare large numbers of Minecraft seeds for a specific structure or layout will find the workflow most useful. Single-player clients run it alone.
How it compares
Seed Finder Mod is a client-side Fabric mod under the MIT License, published for 1.19.2 – 1.20.1. Fake random seed runs on client and server under the GNU General Public License v3.0 only, for 1.21.4 – 1.21.10. SecureSeed-Reborn is open source under the GNU General Public License v3.0 only and works on a client, a server, or both, for 1.21 – 1.21.4. Mamelao's seedchecker targets 1.19.4 alone.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mamelao's seedchecker | Fabric | 1.19.4 | Client-side only | 2026-05-25 |
| Seed Finder Mod | Fabric | 1.19.2 – 1.20.1 | Client-side only | 2023-06-23 |
| Fake random seed | Fabric | 1.21.4 – 1.21.10 | Client and server | 2025-10-12 |
| SecureSeed-Reborn | Fabric | 1.21 – 1.21.4 | Client or server, optional | 2024-12-05 |
Questions
Which Fabric version does Mamelao's seedchecker need?
Does the server need Mamelao's seedchecker?
Where does the seed list come from?
In the catalog
Mamelao's seedchecker is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 9,374 mods support Minecraft 1.19.4.
Similar mods
What the author says
This mod loads a list of seeds which lets check seeds even faster. In the mods folder put the.jar file you installed (you should also have fabric api)
Official listing
- Modrinth page
- modrinth.com/mod/mamelaos-seedchecker
- Owner
- mamelao
- Published
- 2026-05-15
- Updated on Modrinth
- 2026-05-25
- Facts verified
- 2026-10-15