CompatDatapacks

The mod enables backward compatibility for datapacks

8.5K Downloads

fabricforgeneoforgeutility

Rent Server with this Mod

About this Mod

The mod enables backward compatibility for datapacks.

The mod may allow 1.21 to load pre-1.21 data packs.

Functions

Handling plural forms like loading "loot_tables/" as "loot_table/" (1.21-)
Merge tags from a plural directory into tags from a singular directory, such that "tags/blocks/" becomes "tags/block/" (1.21-)
Converting recipe result.item to result.id (1.20.4-)

Available Versions

1.0.16.261-fabricrelease

MC 26.1, 26.1.1, 26.1.2fabric

April 4, 2026

1.0.15.261-fabricrelease

MC 26.1fabric

March 25, 2026

1.0.14.261-fabricrelease

MC 26.1fabric

March 25, 2026

1.0.14.2111-neoforgerelease

MC 1.21.11neoforge

February 11, 2026

1.0.14.216-forgerelease

MC 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10forge

June 20, 2025

How to Install CompatDatapacks 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 "CompatDatapacks". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforge

Minecraft Versions

26.1.2, 26.1.1, 26.1 (+14 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

CompatDatapacks 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 CompatDatapacks compatible with fabric and forge and neoforge?

CompatDatapacks officially supports fabric, forge, neoforge 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 CompatDatapacks – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if CompatDatapacks 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.