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Map Maker Utils

by potan7

Map Maker Utils gives map makers and data pack developers in-game commands, an editor for Dialog JSON files and clearer handling of registry errors on Fabric.

FabricClient-side onlyMIT LicenseOpen source1.21.11 – 26.3

What it does

Map Maker Utils is a lightweight Fabric mod for Minecraft 26.3 that reduces repetitive work when building a map. It provides utility commands for map makers and data pack developers, along with a reload ID, and it shows the paths involved on the top of the screen to make quick debugging easier.

Its in-game editor creates new Dialogs and edits existing Dialog JSON files by ID. It supports the notice, confirmation, multi-action, server links and dialog list types, lets users edit body elements, input controls and actions, both inline and referenced, and validates and normalizes values before they are saved to the world's data pack. When a data pack failure sends the game into Safe Mode, the mod points to the specific error and the registry file responsible.

The mod is client-side only and is open source under the MIT License. Files are published for Fabric, across six release versions 1.21.11 – 26.3, and the latest file is 26.3-1.3.0 for 26.3, dated 2026-10-03. Public source code and an issue tracker are available.

Key features

  1. In-game Dialog editor

    Create new Dialogs and modify existing Dialog JSON files by ID from inside the game.

  2. Dialog type support

    Notice, confirmation, multi-action, server links and dialog list types can all be built and edited.

  3. Value validation

    Values are checked and normalized before being written to the world's data pack.

  4. Registry warning dismissal

    An Ignore session button on the Experimental Registry warning hides it until the game restarts.

  5. Error path display

    Paths and the specific registry file behind a Safe Mode data pack failure are shown on screen for faster debugging.

Compatibility

Latest build for each game version and loader.

26.326.3-1.3.0
26.226.2-1.2.1
26.1.226.1.2-1.2.1
26.1.126.1.2-1.2.1
26.126.1.2-1.2.1
1.21.111.21.11-1.1.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Who it’s for: The mod suits map makers and data pack developers working on Minecraft 26.3 who want command helpers, a Dialog editor and clearer error output in one Fabric mod.

Questions

Does Map Maker Utils need to be installed on the server?

No. The mod is client-side only, so only the client needs it and a server can run without it.

Which loader does Map Maker Utils support?

It is published for Fabric only, in six release versions across 1.21.11 – 26.3.

What happens when the Experimental Registry warning appears?

The Ignore session button hides the warning, and it stays hidden until the game restarts.

In the catalog

Map Maker Utils is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.

Utility mods36,990Fabric modsMods for 26.38,071

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What the author says

Streamline your Map Making & Data Pack workflow in Minecraft 26.3 - 1.21.11. Map Maker's Utils (MMU) is a lightweight Fabric mod designed to reduce repetitive tasks for map makers and data pack developers. It provides essential commands, an in-game editor, and UI improvements to handle registry changes and data pack…
potan7, on the Modrinth page

Official listing

Owner
potan7
Published
2025-12-18
Updated on Modrinth
2026-10-03
Facts verified
2026-10-15

Tags

Utility
Open on ModrinthCompare