Crimes Against the JVM
Execute arbitrary bytecode (client-only!) from books you wrote. Because funny. Now compatible with Sinytra Connector & Forgified Fabric API!
About this Mod
THIS IS CLIENT ONLY
Execute arbitrary JVM bytecode from books you wrote (Has to be your PlayerEntity as the author for security reasons) - just hold it in your offhand and press the key (Unbound by default, also for security reasons.)
Will not run on servers, for hopefully obvious reasons.
Available Versions
How to Install Crimes Against the JVM on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Crimes Against the JVM". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Crimes Against the JVM server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is Crimes Against the JVM compatible with fabric?
Crimes Against the JVM officially supports fabric for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Crimes Against the JVM – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Crimes Against the JVM consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Install Crimes Against the JVM with just one click on your server.