JSON to PHP Class Generator (PHP 8)

About the JSON to PHP Class

Generate modern PHP 8 classes from JSON, with promoted, typed and readonly constructor properties and a static fromArray() factory that hydrates nested objects from json_decode output.

Key features

• PHP 8 classes with constructor property promotion
• Typed, optionally readonly properties (PHP 8.1+)
• Static fromArray() factory that hydrates nested objects
• @var list<T> docblocks for typed arrays
• Nullable and missing values default to null
• strict_types enabled

Typed PHP classes from JSON

Working with json_decode arrays means string keys everywhere and no autocomplete. Modern PHP can do much better: typed, readonly value objects. Paste JSON and get classes with constructor promotion and a fromArray() factory that builds nested objects for you.

Example

{ "id": 1001, "price": 9.5, "tags": ["gift"], "customer": { "name": "Ada" }, "coupon": null }

final class Order
{
    public function __construct(
        public readonly int $id,
        public readonly float $price,
        /** @var list<string> */
        public readonly array $tags,
        public readonly Customer $customer,
        public readonly mixed $coupon = null,
    ) {}

    public static function fromArray(array $data): self
    {
        return new self(
            id: $data['id'],
            price: $data['price'],
            tags: $data['tags'],
            customer: Customer::fromArray($data['customer']),
            coupon: ($data['coupon'] ?? null),
        );
    }
}

Type mapping

Works great with

• Laravel: return them from services, or map HTTP client responses: Order::fromArray($response->json()).
• Symfony: as DTOs alongside the Serializer component.
• Static analysis: PHPStan and Psalm understand the types and docblocks.

Related tools

Need a plain array literal for a config file? Use JSON to PHP Array.

How to use the JSON to PHP Class

1. Paste your data into the input box, upload a file, or click Sample to try it out.
2. Adjust the options above the editor if you need to (indentation, delimiter, and so on).
3. The PHP Class appears instantly in the output panel. Any errors are shown with their line and column.
4. Click Copy to copy the result, or Download to save it as a file.