Datapack JSON Builders

Build recipe, predicate, kit, and NBT-to-component migration JSON for your datapack.

Quick guides

How to use this tool, and the questions players ask most.

Custom recipes: shaped, shapeless, and using tags instead of listing every woodA shaped recipe that will not craft usually has its key wrong or its pattern padded. Here is the JSON, t

Where do custom recipe JSON files go in a

datapack?

Custom recipe JSON files belong in the data//recipe/ directory within your datapack folder. In Minecraft 1.21, subfolders inside this path automatically define the recipe namespace and ID after running /reload.

How do I make a custom smelting

recipe JSON?

Set the type field to minecraft:smelting, define the ingredient item ID, set result, and specify cookingtime in ticks. For example, standard furnace smelting takes 200 ticks and grants experience defined in the experience float value.

How do custom

recipe JSON files work in Bedrock Edition?

Bedrock Edition requires recipe files in the recipes/ folder of a behavior pack using format_version "1.12". The root object must contain the minecraft:recipe_shaped or minecraft:recipe_shapeless property with description identifiers.

How do I update old item NBT JSON to 1.20.5 components?

Replace the top-level tag compound with individual item components such as minecraft:custom_data or minecraft:enchantments introduced in Minecraft 1.20.5. The Datapack JSON Builders tool translates legacy NBT syntax directly into the modern component format.

What is a predicate JSON file used for in Minecraft?

Predicate JSON files evaluate game conditions such as weather, player equipment, or random chance for loot tables and command execution. They are stored in data//predicate/ and can be tested in-game using the /execute if predicate command.