What's That Slot?
This mod is a simple utility that allows you to query which items can be placed in a specific slot by holding down Left-Alt. The mod supports both NeoForge and Fabric (and Forge for older versions) - make sure to select the right file!
This is particularly useful in modded environments where it may not be clear what items can be placed in a modded GUI.

Relevant items can also be quickly transferred from your inventory by clicking on them in the query window:

This mod works client-only, so it does not need to be installed on the server to run!
All Versions
+ Add Version- Update to Minecraft 1.21.5
- Note: both JEI and REI integration are disabled, as they are not available for this version yet.
- Update to Minecraft 1.21.5
- Note: both JEI and REI integration are disabled, as they are not available for this version yet.
- Updated to Minecraft 1.21.4
- Dropped support for Forge
- Updated to Minecraft 1.21.4
- Dropped support for Forge
- Update to Minecraft 1.21 by @R0bbyYT in https://github.com/Gegy/whats-that-slot/pull/20
- Update to Minecraft 1.21 by @R0bbyYT in https://github.com/Gegy/whats-that-slot/pull/20
- Update to Minecraft 1.21 by @R0bbyYT in https://github.com/Gegy/whats-that-slot/pull/20
- Updated to Minecraft 1.20.4
- Introduced support for NeoForge
- Updated to Minecraft 1.20.4
- Introduced support for NeoForge
- Updated to Minecraft 1.20.4
- Introduced support for NeoForge
- Updated to Minecraft 1.20.1
- Updated to Minecraft 1.20.1
- Update to Minecraft 1.19.4
- Update to Minecraft 1.19.4
- Update to Minecraft 1.19.3
- Note: the Forge version does not currently support JEI integration, due to it not yet being updated
- Update to Minecraft 1.19.3
- Note: the Forge version does not currently support JEI integration, due to it not yet being updated
- Update to Minecraft 1.19.2
- Update to Minecraft 1.19.2
- Update to 1.19
- Update to 1.19