Uranium
by jasiek
Uranium is a Fabric client mod that deliberately lowers frame rates, so a game running too smoothly turns into a slideshow.
What it does
Uranium works by reducing the number of frames the game draws each second, which players sometimes call a joke or a stress test rather than a practical setting. It only has an effect on the client, so the server needs nothing and players join without installing anything extra. Files are published for Fabric and cover every release 1.21 – 1.21.11 across 12 release versions, with 1.0.0 for 1.21.11 as the latest file.
The mod is cursed in its purpose: it is meant to make the game look worse on purpose and to push a computer's frame limit beyond what the author intended. Its author notes describe it as a way to produce chaotic screenshots of technical showcases. Fabric API is not listed as a requirement, and Uranium does not depend on any other mod.
The license is the MIT License, and the project is not open source. Uranium was first published and last updated on 2025-08-04, and the release list covers every Fabric build without gaps.
Key features
Lowered frame rate
Uranium caps the game's frame output so the picture visibly stutters, which is the central effect of the mod.
Frame limit override
The mod pushes past the limit a computer would otherwise place on frame output, so the game runs faster than the player expects.
Chaos screenshots
The effect suits screenshots and clips that show the frame rate being pushed to an extreme or made deliberately unstable.
Client-only install
Only the player's client loads the mod, so servers can run without it and players can switch it on for single-player or multiplayer.
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Cursed screenshots
Players who want distorted, unstable images for showcases can run Uranium on the client and capture the result.
Stress testing
Players who want to see how their computer handles extreme frame output can use Uranium to push the limit and observe the effects.
Who it’s for: Uranium suits players who enjoy novelty and cursed mods, and creators who make chaotic screenshots or clips. It is a client-side mod, so it does not need to be installed on a server, and it does not require any other mod.
Questions
Does Uranium need Fabric API?
Does Uranium have to be installed on the server?
Which game versions does Uranium support?
In the catalog
Uranium is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from jasiek
Similar mods
What the author says
Ever thought your game runs too smoothly? Uranium is here to help—by turning your silky frames into a slideshow.
Official listing
- Modrinth page
- modrinth.com/mod/uraniummod
- Owner
- jasiek
- Published
- 2025-08-04
- Updated on Modrinth
- 2025-08-04
- Facts verified
- 2026-10-15