Item Filter
by ThBTT
Item Filter is a Fabric storage block that works like a hopper and passes only the items its filter slots allow, or everything when the filter is switched off.
What it does
Item Filter is placed like a vanilla hopper. Items enter it from the top, through hoppers, or from any inventory placed above it, and leave through the side the block faces. Its internal hopper inventory holds the items in transit, and a set of filter slots decides which of them may pass.
The filter mode can be toggled. With it on, only items that match a filter slot enter the block. With it off, the block behaves like a normal hopper and lets every item through, so the same block can be switched between the two roles without being replaced. The mod's configurable options are described in its source code.
Item Filter is a Fabric mod for 1.21.1 and is released under the MIT License, so its code is open source and public links to the source and issue tracker exist. The server and every player need the mod installed.
Key features
Filter slots
While filter mode is switched on, only the items placed in the filter slots are let through the block.
Toggleable filter mode
The filter mode can be turned on and off, so the block acts as a filter or as a normal hopper.
Hopper-style placement
The block is placed like a vanilla hopper and accepts items from the top and passes them out of the facing side.
Internal hopper inventory
Items that pass through are held in the block's own hopper inventory before moving on.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Sorting a storage line
A filter placed between two chests sends only the chosen items onward while the rest stay behind.
Item distribution in farms
Farm output can be split by type, with filtered items routed to one collection point and the rest to another.
Who it’s for: Item Filter suits players building automated storage or farm sorting in survival worlds, and server owners who want item routing without extra mods on the client side.
How it compares
Hopper Filter is Fabric and server-side only, open source under CC0 1.0 Universal, and covers 1.21.6 – 1.21.8, so it targets later versions than Item Filter. Hoppify is a Fabric mod for 1.21.11 that needs the client and server, under the MIT License and not open source. Redstone Hopper is a Fabric mod for 26.1.2, also client and server, under the MIT License and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Item Filter | Fabric | 1.21.1 | Client and server | 2026-05-10 |
| Hopper Filter | Fabric | 1.21.6 – 1.21.8 | Server-side only | 2025-07-09 |
| Hoppify | Fabric | 1.21.11 | Client and server | 2026-02-05 |
| Redstone Hopper | Fabric | 26.1.2 | Client and server | 2026-07-31 |
Questions
Does Item Filter need to be installed on both sides?
Which loader does Item Filter support?
Can Item Filter act as a normal hopper?
In the catalog
Item Filter is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from ThBTT
Similar mods
What the author says
Item Filter is a Minecraft Fabric mod that adds a configurable item filter block. It works like a hopper, but with filter slots and a toggleable filter mode. You can choose which items are allowed to pass through, or disable the filter mode and use it like a normal hopper.
Official listing
- Modrinth page
- modrinth.com/mod/item-filter
- Owner
- ThBTT
- Published
- 2026-05-10
- Updated on Modrinth
- 2026-05-10
- Facts verified
- 2026-10-15