Formatowanie JSON i walidator składni

JSON Syntax Rules

Basic rules

• Wrap the document in { } braces.
• Each entry is a key/value pair joined by :.
• Use , between pairs (but not after the last pair).
• key must be wrapped in " ".
• value can be multiple types (strings must be wrapped in " ").

{
    "id": 123,
    "name": "Taro Yamada",
    "registered": true,
    "nickname": null,
    "skills": [
        "html",
        "JavaScript"
    ],
    "contact": {
        "phone": "0X0-123-456",
        "email": "taro@xxxxx.jp"
    }
}

Allowed types for value

Note: JSON has no undefined type.

Patterns

Array

Inside [ ], you can put elements of different types.

["text", 123, true, false, null]

You can also include objects as elements.

[
    {
        "id": 1001,
        "name": "Steve Jobs"
    },
    {
        "id": 1002,
        "name": "Bill Gates"
    }
]

Object

Inside { }, values can be any allowed type.

{
    "id": 123,
    "name": "Taro Yamada",
    "registered": true,
    "nickname": null
}

You can nest objects.

{
    "id": 123,
    "name": "Taro Yamada",
    "contact": {
        "phone": "0X0-123-456",
        "email": "taro@xxxxx.jp"
    }
}

You can also put arrays in objects.

{
    "id": 123,
    "name": "Taro Yamada",
    "skills": [
        "html",
        "JavaScript"
    ]
}

Common mistakes

Missing quotes around the key

Keys must be wrapped in " ". Fix id on line 2 to "id".

1{
2    id: 123,
3    "name": Taro Yamada
4}

Missing quotes around a string value

String values must be wrapped in " ". Fix Taro Yamada on line 3 to "Taro Yamada".

1{
2    "id": 123,
3    "name": Taro Yamada
4}

Invalid quotes for string values

String values cannot be wrapped in single quotes. Fix 'Taro Yamada' on line 3 to "Taro Yamada".

1{
2    "id": 123,
3    "name": 'Taro Yamada'
4}

Trailing comma

The last key/value pair must not end with ,. Fix "Tokyo", on line 4 to "Tokyo".

1{
2    "id": 123,
3    "name": "Taro Yamada",
4    "address": "Tokyo",
5}