Data Dumper
A Minecraft mod that helps datapack developers quickly browse and export registry data.
About this Mod
DataDumper
A Minecraft mod that helps datapack developers quickly browse and export registry data.
About
Ever found yourself constantly needing to check what's inside a registry while developing datapacks? Or wanting to filter for specific blocks and items?
DataDumper lets you browse registries directly in-game via commands, with support for tag and regex filtering. You can also export registry entries as JSON files for easy debugging.
On top of that, DataDumper prevents game crashes caused by invalid datapacks, so you can debug with peace of mind.
Features
- List all registries in the game
- Filter registry contents by tag or regex
- Export registry entries as JSON files
- Export datapack entries that failed to parse, making it easy to track down errors
- Prevent crashes when creating a world with invalid datapacks
- Click chat messages to copy all entries at once
Commands
| Command | Description |
|---|---|
/datadumper registries |
List all registries |
/datadumper registry <key> |
View all entries in a registry |
/datadumper registry <key> #<tag> |
Filter registry entries by tag |
/datadumper registry <key> "<regex>" |
Filter registry entries by regex |
/datadumper entry <key> |
Export registry entries as JSON files |
/datadumper entry <key> #<tag> |
Filter and export by tag |
/datadumper entry <key> "<regex>" |
Filter and export by regex |
Exported files are saved in the .datadumper/ folder under the server's working directory.
Screenshots
Regex filtering — Find all blocks containing "planks":
Tag filtering — Find all blocks tagged #c:chests:
Supported Versions
| Minecraft Version | Fabric | Forge | NeoForge |
|---|---|---|---|
| 1.20.1 | ✅ | ✅ | — |
| 1.21.1 | ✅ | — | ✅ |
| 26.1 | ✅ | — | ✅ |
Recommended Companions
- Mod Sets — Easily disable development mods in published modpacks
Available Versions
How to Install Data Dumper 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 "Data Dumper". 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 (+11 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Data Dumper 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 Data Dumper compatible with fabric and forge and neoforge and quilt?
Data Dumper officially supports fabric, forge, neoforge, quilt for Minecraft 26.1.2, 26.1.1, 26.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Data Dumper – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Data Dumper 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.
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Rent Modded Server
Install Data Dumper with just one click on your server.