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JSON to Python

Generate Python dataclass from any JSON object.

Input

Python Dataclass

📖 What is JSON to Python?

JSON to Python converts a JSON sample into Python code — either as a typed dictionary literal or as dataclass definitions with type hints. Use it to quickly scaffold Python models from API responses, generate typed data structures, or create test fixtures from JSON samples. All processing happens in your browser.

💡 Example

Input

{"name":"Alice","age":30,"tags":["dev","admin"]}

Output

data = { "name": "Alice", "age": 30, "tags": ["dev", "admin"] }

🛠️ Common Use Cases

Creating Python dataclasses from API response samples
Generating typed dictionaries with TypedDict for type checking
Building test fixtures and mock data from JSON examples
Converting JSON config into Python dict literals
Scaffolding Pydantic models from JSON schema samples

📝 Python JSON Type Mapping

JSON string → str
JSON number (integer) → int
JSON number (decimal) → float
JSON boolean → bool
JSON null → None
JSON array → list
JSON object → dict or dataclass

⚠️ Common Mistakes

True vs true — Python uses True/False/None (capitalized), not JSON's true/false/null
Single vs double quotes — Python allows both, but JSON requires double quotes. json.loads() handles this automatically.
Large integers — Python handles arbitrary precision integers natively, but be careful when round-tripping through JSON (some parsers use float64)

❓ Frequently Asked Questions

Does it generate dataclasses? ▾

It generates Python dict literals. For dataclass or Pydantic model output, use the dict as a starting point and add type annotations manually, or use a dedicated tool.

How does Python handle JSON null? ▾

JSON null becomes Python None. When using json.loads(), this conversion is automatic.

Can I use the output with type hints? ▾

Yes — the generated code uses correct Python types. Add TypedDict or dataclass decorators for full static type checking with mypy.

Is my data private? ▾

Yes — all processing runs entirely in your browser. Your data is never sent to any server.

Is this tool free? ▾

Completely free — no login, no usage limits, works offline once loaded.

Yes — completely free, no login required, no usage limits.

Is my data private? ▾

Yes — all processing runs in your browser. Your data is never sent to any server.

Does it work offline? ▾

Yes — once the page is loaded, the tool works without an internet connection.

🔒

Your data stays private. All processing happens entirely in your browser using JavaScript. Nothing is ever sent to our servers. You can even use this tool offline after the page loads.