Experimentalist
by pajic
Experimentalist lets a world enable features that Minecraft marks as experimental, from the start, without the usual warning screens.
What it does
Minecraft normally asks for confirmation before a world can use experimental features, and hides them in world creation unless the player opens the advanced options. Experimentalist removes that screen and makes experimental features available globally, so a world can be set up with them on the first launch. Worlds that use features flagged as experimental still show the experimental flavor text on the world selection screen.
The mod is useful to modpack authors who want experimental features available in a modpack without asking each player to take extra steps. It needs no user interaction and has no visible effect beyond removing the warnings. It depends on mod dependencies, even Fabric API on Fabric, and it is published for Fabric, Forge and NeoForge for 1.20 – 26.3, under the MIT License, and is open source. Either side can run it, and neither needs it.
Key features
Warning screen removed
The experimental settings warning screen no longer appears, so experimental features can be enabled directly.
Hidden features shown
Experimental features that are hidden in world creation become available without opening the advanced options.
Global switch
Experimental features can be made global through a config file in the mod config folder.
Per-feature config
Each experimental feature is set to true or false in experimentalist.json, and changes apply after the game restarts.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Modpack setup
A modpack author can enable experimental features for every player at once, instead of documenting manual steps for each world.
Servers with fixed settings
Server owners can prepare experimental features in the config file before players connect, so new worlds start with them already on.
Who it’s for: Modpack authors and server owners who want experimental Minecraft features on by default, and players who build worlds with them.
How it compares
Hide Experimental Warning is client-side only, is not open source, is released under All rights reserved and covers 1.19.2 – 26.3 on Fabric, Forge, NeoForge and Quilt; it only hides the warning. Thanks I Have REI is open source under the MIT License, and either side can run it while neither needs it, covering 1.18 – 1.21.1 on Fabric, Forge, NeoForge and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Experimentalist | Fabric, Forge and NeoForge | 1.20 – 26.3 | Client or server, optional | 2026-03-31 |
| Hide Experimental Warning | Fabric, Forge, NeoForge and Quilt | 1.19.2 – 26.3 | Client-side only | 2026-10-02 |
| Thanks I Have REI | Fabric, Forge, NeoForge and Quilt | 1.18 – 1.21.1 | Client or server, optional | 2025-08-19 |
Questions
Does Experimentalist need Fabric API?
Which loader files are available?
Does the config change apply immediately?
In the catalog
Experimentalist is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
More from pajic
Similar mods
What the author says
This mod removes the "Worlds using Experimental Settings are not supported" screen and allows you to enable experimental features globally. Those features will then be enabled by default on world creation and hidden from the experimental features screen. Worlds using those features will not be flagged as experimental…
Official listing
- Modrinth page
- modrinth.com/mod/experimentalist
- Owner
- pajic
- Published
- 2024-12-18
- Updated on Modrinth
- 2026-03-31
- Facts verified
- 2026-10-15