ModsFinder

Old Debug Screen

by mobilelize

Old Debug Screen brings back the original F3 debug overlay for players who miss the layout from before the 1.21.9 update.

FabricClient-side onlyMIT LicenseOpen source1.21.9 – 26.3

What it does

Old Debug Screen restores the debug screen that Minecraft replaced in version 1.21.9. The author notes that the update removed some features players used for debugging gameplay, and the mod returns them to the screen, giving a more informative view than the current one. Only the client needs it, so players can run it alone in single-player or on a server that does not have it installed. Fabric API is required. Builds are published for Fabric across 8 release versions, 1.21.9 – 26.3, and the code is open source under the MIT License.

Key features

  1. Original F3 layout

    Reverts the debug screen to the layout used before the 1.21.9 change, with its earlier sections.

  2. Restored debugging data

    Brings back gameplay debugging information that the update removed from the screen.

  3. Revert toggle

    Players who prefer the newer screen can switch back, since the mod only changes the overlay it replaces.

Compatibility

Latest build for each game version and loader.

26.31.0.2+26.3
26.21.0.2+26.2
26.1.21.0.0+26.1
26.1.11.0.0+26.1
26.11.0.0+26.1
1.21.111.0.0+1.21.11
1.21.101.0.0+1.21.9
1.21.91.0.0+1.21.9
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

How it compares

Full comparison

Old F3 Debug Screen is also an open source Fabric client mod under the MIT License, but it targets 26.1 – 26.1.2. Old F3 Screen is a client-side Fabric mod for 1.21.11 only and is not open source, with All rights reserved. Old Debug Screen covers 1.21.9 – 26.3 instead.

ModLoadersGame versionsEnvironmentUpdated
Old Debug ScreenFabric1.21.9 – 26.3Client-side only2026-09-20
Old F3 Debug ScreenFabric26.1 – 26.1.2Client-side only2026-04-03
Old F3 ScreenFabric1.21.11Client-side only2026-02-01

Questions

Does Old Debug Screen need Fabric API?

Yes. Fabric API is a required dependency and must be installed alongside the mod on Fabric.

Does a server need Old Debug Screen installed?

No. Players add it to their own game, and a server needs no copy.

In the catalog

Old Debug Screen is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 8,071 mods support Minecraft 26.3.

Technology mods8,499Fabric modsMods for 26.38,071

More from mobilelize

All projects
Network Protocol Disconnect1.20.5 – 26.3Hold That Chunk V21.21 – 26.3Revert Toggle Sneak1.21.9 – 26.3Better Player Visibility1.21 – 26.3Team Chat1.20 – 26.3Multi Chat1.21 – 26.3

Similar mods

CC: Tweaked1.4.7 – 26.3Applied Energistics 2 Wireless Terminals1.16.5 – 26.3Moving Elevators1.12 – 26.3Camerapture1.20 – 26.3No Fog1.19 – 26.3Create: Ultimate Factory1.19.2 – 26.2

What the author says

This mod restores the old debug screen from Minecraft, which was changed in version 1.21.9. The update removed some features that players found useful for debugging and gameplay. This mod brings back those original features for a more informative experience. Keywords: Reverts the debug screen, Old F3 Menu, Old F3…
mobilelize, on the Modrinth page

Official listing

Owner
mobilelize
Published
2026-03-14
Updated on Modrinth
2026-09-20
Facts verified
2026-10-15

Tags

Game mechanicsTechnologyUtilityDecoration
Open on ModrinthCompare