Woppers

Smart hopper filtering and speed control through simple anvil renaming.

Overview

Woppers enhances vanilla hoppers by allowing players to configure filters and transfer speeds through simple anvil renaming.

No commands. No GUIs. No menus. No extra blocks.

Simply rename a hopper in an anvil, place it, and Woppers automatically applies the configured behavior.

Designed for survival servers, technical players, storage systems, item sorters, automation builds, and large-scale farms.

Features

Item Filtering

Transfer only specific items through a hopper.

IRON_INGOT
DIAMOND
NETHERITE_INGOT

Custom Hopper Speeds

Control hopper transfer speed directly from the hopper name.

*/4
*/8
*/20

Lower values transfer items faster.

Higher values transfer items slower.

Combined Rules

Combine filtering and speed control in a single hopper.

IRON_INGOT/4
DIAMOND/2
COBBLESTONE/16

NBT Filtering (Beta)

NBT filtering is currently considered a beta feature.

While functional, some edge cases involving custom items, metadata, or third-party plugins may still exist.

Please report any unexpected behavior.

Vanilla Friendly

Invalid hopper names automatically fall back to vanilla behavior.

No item loss
No world conversion
No client modifications
No compatibility issues with existing worlds
Safe fallback handling

Examples

Hopper Name	Result
`IRON_INGOT`	Transfers only iron ingots
`DIAMOND`	Transfers only diamonds
`*/4`	Transfers all items at speed 4
`*/16`	Transfers all items at speed 16
`IRON_INGOT/4`	Iron only at speed 4
`COBBLESTONE/20`	Cobblestone only at speed 20

Compatibility

Software	Status
Minecraft 26.1.2	Supported
Paper 26.1.2	Supported
Java 25	Supported
Java Edition	Supported
Bedrock Edition	Supported
Geyser	Supported
Floodgate	Supported

Why Use Woppers?

Better Sorting Systems

Create specialized hopper networks without complicated redstone designs.

Cleaner Storage

Keep resources automatically separated.

Faster Automation

Optimize item movement using configurable transfer speeds.

Technical Builds

Perfect for storage rooms, farms, sorting systems, factories, and automation projects.

Lightweight

Designed to remain efficient even on larger survival servers.

Installation

Download the latest release.
Place the plugin inside your plugins folder.
Start or restart the server.
Rename a hopper in an anvil.
Enjoy.

Performance

Recommended transfer speeds:

Speed	Usage
2-4	Very Fast
8	Vanilla-Like
10-20	Moderate
20+	Slow

Using extremely low values on massive hopper networks may increase server load.

Technical Information

Property	Value
Platform	Paper
Minecraft	26.1.2
Java	25
Build Tool	Gradle
License	GPL-3.0
Client Required	No
Server Side	Yes

FAQ

Does Woppers require a client mod?

No.

Woppers is completely server-side.

Does it work with Bedrock players?

Yes.

All functionality runs entirely on the server and is compatible with Geyser and Floodgate.

Does it replace vanilla hoppers?

No.

Woppers extends vanilla hopper functionality while preserving normal behavior.

Does it work in existing worlds?

Yes.

Existing worlds and hoppers remain fully compatible.

License

Licensed under the GNU General Public License v3.0 (GPL-3.0).

Author

WafflyCatt

Built for modern Paper servers.

Support

Found a bug or have a suggestion?

Please include:

Plugin version
Paper version
Hopper rule used
Steps to reproduce
Console logs (if applicable)

Built for Minecraft Paper 26.1.2.

Woppers for Java [Filtering Hoppers]