JSON Creation Nodes

Reference for the nodes that build and modify JSON strings.

Category: Scooter Utilities > JSON > Creation

Creation nodes build JSON from scratch or modify existing JSON. Each one takes a JSON string and returns an updated copy through its JSON String Out pin, so you can chain them together to build complex structures. The output is compact JSON on a single line. Use Pretty Print JSON when you want it readable.

WARNING

If the JSON String input isn't a valid JSON object, the add nodes start over with a new, empty object. Use Is Valid JSON first if you're not sure what you're passing in.

Add Field

The workhorse of JSON creation. Adds a field to your JSON, with a type you pick from a dropdown.

Pin	Direction	Description
Field Type	Input	String, Number, or Boolean.
JSON String	Input	The existing JSON. Leave empty to start a new object.
Field Name	Input	The name of the field, like health, score, or name. If the field already exists, its value is replaced.
Value	Input	The value as a string. It's converted based on Field Type.
JSON String Out	Output	The updated JSON.

// Adding a string
Add Field(String, "", "name", "Bob")
→ {"name":"Bob"}

// Adding a number
Add Field(Number, "", "health", "100")
→ {"health":100}

// Adding a boolean
Add Field(Boolean, "", "alive", "true")
→ {"alive":true}

// Chaining them together
"" → Add Field(String, -, "name", "Bob")
   → Add Field(Number, -, "health", "100")
   → Add Field(Boolean, -, "alive", "true")
→ {"name":"Bob","health":100,"alive":true}

Tips:

• Numbers: A value that isn't a number, like hello, becomes 0. Garbage in, zero out.
• Numbers: Values are converted with single-precision (float) accuracy, so very large whole numbers and some decimals may not round-trip exactly.
• Booleans: true, yes, and on (in any case) and any non-zero number become true. Everything else becomes false.

Add Array Field

For when you need a list. Adds an array of strings, numbers, or entire JSON objects.

Pin	Direction	Description
Array Type	Input	String Array, Number Array, or Object Array.
JSON String	Input	The existing JSON.
Field Name	Input	The name of the array field.
Values	Input	An array of strings. Each one is converted based on Array Type.
JSON String Out	Output	The updated JSON.

// String array (player inventory items)
Add Array Field(String Array, "", "inventory", ["sword", "potion", "shield"])
→ {"inventory":["sword","potion","shield"]}

// Number array (high scores)
Add Array Field(Number Array, "", "scores", ["100", "250", "175"])
→ {"scores":[100,250,175]}

// Object array (list of players)
Player1 = {"name":"Alice","score":100}
Player2 = {"name":"Bob","score":200}
Add Array Field(Object Array, "", "players", [Player1, Player2])
→ {"players":[{"name":"Alice","score":100},{"name":"Bob","score":200}]}

Tips:

• Object arrays are super useful for lists of enemies, items, players, and so on.
• In an Object Array, any value that isn't a valid JSON object is skipped.
• Empty arrays are totally fine: [].

Add Object Field

Nesting dolls, JSON edition. Puts one JSON object inside another, which is great for grouping related data.

Pin	Direction	Description
JSON String	Input	The parent JSON.
Field Name	Input	The name of the nested object field.
Nested JSON	Input	The JSON object to nest. If it isn't valid, an empty object {} is nested instead.
JSON String Out	Output	The updated JSON.

// Create position data
Position = "" → Add Field(Number, -, "X", "100")
              → Add Field(Number, -, "Y", "200")
              → Add Field(Number, -, "Z", "50")
→ {"X":100,"Y":200,"Z":50}

// Add it to player data
PlayerData = "" → Add Field(String, -, "name", "Hero")
                → Add Object Field(-, "position", Position)
→ {"name":"Hero","position":{"X":100,"Y":200,"Z":50}}

Tips:

• Build the inner objects first, then nest them.
• You can nest as deep as you want (but maybe don't go crazy).
• Perfect for vectors, rotators, or any grouped data.

Add Null Field

Sometimes nothing is something. Adds a field with a null value, for when you want to say "this field exists but has no value."

Pin	Direction	Description
JSON String	Input	The existing JSON.
Field Name	Input	The name of the null field.
JSON String Out	Output	The updated JSON.

Add Null Field("", "middleName")
→ {"middleName":null}

Tips:

• Null is different from an empty string "" or zero.
• Use it when a value is optional but you want to track that the field exists.
• Check for it later with Is Field Null.

Remove Field

The eraser. Removes a field from your JSON and tells you whether it actually found something to remove.

Pin	Direction	Description
JSON String	Input	The JSON to modify.
Field Name	Input	The field to remove.
Success	Output	true if the field existed and was removed.
JSON String Out	Output	The JSON with the field removed. If JSON String isn't valid JSON, it's returned unchanged.

JSON = {"name":"Bob","age":25,"temp":99}
Remove Field(JSON, "temp")
→ {"name":"Bob","age":25}
→ Success: true

Merge JSON

Smooshes two JSON objects together. Fields from the second object overwrite any matching fields in the first.

Pin	Direction	Description
JSON String 1	Input	The base JSON.
JSON String 2	Input	The JSON to merge in.
JSON String Out	Output	The combined JSON.

JSON1 = {"name":"Bob","age":25}
JSON2 = {"age":26,"score":100}

Merge JSON(JSON1, JSON2)
→ {"name":"Bob","age":26,"score":100}

Tips:

• The second JSON wins on conflicts (age became 26).
• Great for applying updates or patches.
• Nested objects aren't merged. A nested object in the second JSON replaces the one in the first.
• If JSON String 2 isn't valid, you get JSON String 1 back.

Pretty Print JSON

Makes it look nice. Formats JSON with indentation and line breaks, which is perfect for debugging or saving human-readable files.

Pin	Direction	Description
JSON String	Input	The JSON to format.
JSON String Out	Output	The formatted JSON, indented with tabs. If the input isn't valid JSON, it's returned unchanged.

Before: {"name":"Bob","health":100,"alive":true}

After:
{
	"name": "Bob",
	"health": 100,
	"alive": true
}

Tips:

• Use it before saving files that people need to read or edit, like config files.
• It doesn't change the data, just the formatting.

Minify JSON

Strips all the whitespace. Removes formatting, indentation, and line breaks to make JSON compact for storage or sending over a network.

Pin	Direction	Description
JSON String	Input	The JSON to minify.
JSON String Out	Output	The compact JSON. If the input isn't valid JSON, it's returned unchanged.

Before:
{
	"name": "Bob",
	"health": 100,
	"alive": true
}

After: {"name":"Bob","health":100,"alive":true}

Tips:

• Use it before saving to disk to reduce file size, or before sending data where size matters.
• It's the opposite of Pretty Print JSON. The data is identical, only the formatting changes.