Old F3 Debug Screen
Reverts the debug screen / hud to the look before 1.21.9
About this Mod
Description
Adds back the F3/Debug Screen that was in Minecraft before 1.21.9 if you don like the new version.
The mod will support more versions in the future but its only avalibe for 26.1 for now.
Planned Versions: 1.21.9-1.21.11
Available Versions
How to Install Old F3 Debug Screen 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 (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Old F3 Debug Screen". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 26.1
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Old F3 Debug Screen 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 (26.1.2). You can switch loaders with one click in the panel.
Is Old F3 Debug Screen compatible with fabric?
Old F3 Debug Screen officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Old F3 Debug Screen – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Old F3 Debug Screen 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.
Similar Mods
Rent Modded Server
Install Old F3 Debug Screen with just one click on your server.