
Declarative UI
A data-driven UI mod for Minecraft using Fabric, making creation of GUIs easier and creating commands possible within a datapack.
No need to learn Java or Kotlin.
Containers also exist, so you could try making a sell gui, etc.
📖 Usage
To create a datapack, you can use /datapack create <id> <description>. You'll find it in your world's datapacks folder.
To create a GUI, which also allows customized slot actions and titles, create a JSON file within its data/<namespace>/declarative_ui/menu folder you'll create. For the format of the JSON, check the Menu Generator
To create a Command, with or without parameters, follow previous steps but put the JSON within data/<namespace>/declarative_ui/command and check the Command Generator for the format.
To create a container, create a JSON file within data/<namespace>/declarative_ui/container and put a number greater than 0 in a size field.
To handle a custom click action, create a JSON file within data/<namespace>/declarative_ui/custom_click_action and put a function path in a function field.
📖 Extra Commands
- Use
/item (modify|replace) containerfor command modification of player stored containers - Use
/declarative_ui open <targets> <menu>to open a menu /execute if container
📖 Loot Tables
- In 1.21.11+ you can choose the
declarative_ui:containerslot source in a slot entry
You can also download the .mcdoc and commands.json files for Spyglass here: https://cdn.modrinth.com/data/5UTWPtx3/versions/ACQaQoYf/spyglass.zip?mr_download_reason=standalone
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 26.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as declarative-ui-1.3+26.2.jar — drop this file into the mods folder
- Download size: 238 KB
- Download link checked 8 Sept 2026 — working
These come from our own check of the pack file, not from the source page.