Tool Introduction
"JSON to Python Class" is an efficient and convenient online tool designed to help developers quickly convert JSON strings into standardized Python class definitions. It intelligently parses the structure and data types of JSON data, automatically generating Python class code with attributes and type hints, greatly simplifying the process of creating data models (such as API responses, configuration files, etc.), and reducing the tediousness and error rate of manual coding.
How to Use
- Paste the JSON data you need to convert into the "JSON String" input box on the left.
- The tool will automatically display the generated Python class code in the "Converted Class" output box on the right, based on the input JSON structure, or after you perform the conversion operation.
- You can directly copy the Python code from the output box and integrate it into your Python project.
Input Parameters
- JSON String: Required parameter, please ensure that the input is a string that conforms to the JSON format specification. This input box supports JSON language highlighting.
Output Format
- Converted Class: The generated Python class definition code, including class name, attributes, and their corresponding type hints. This output box supports Python language highlighting.
Frequently Asked Questions
- Q: What input formats does this tool support?
- A: This tool only supports standard JSON string format as input, including JSON objects and JSON arrays. Please ensure your JSON data is syntactically correct.
- Q: Which Python version is the output Python class code suitable for?
- A: The generated Python class code typically uses Python 3.6+ type hints syntax. For earlier Python versions, manual adjustments may be required.
- Q: Does it support converting nested JSON objects into nested Python classes?
- A: Yes, this tool can intelligently parse JSON's nested structure and generate independent Python class definitions for each level of nested objects, correctly handling their reference relationships.
- Q: What is the default name for the generated Python class?
- A: For top-level JSON objects, the default class name is usually
Root. For nested objects, the class name will be capitalized based on its key name in JSON or generated according to specific rules. Users can modify these class names according to actual needs.
Notes
- The input JSON string must be valid and correctly formatted, otherwise the tool may not parse it correctly or generate incorrect Python code.
- The tool will attempt to automatically infer the data types of JSON fields (such as
str, int, bool, list, dict, etc.), but for very complex, ambiguous, or mixed-type lists, users may need to manually adjust the generated type hints according to actual business logic.
- If JSON key names contain characters that do not conform to Python variable naming conventions (such as hyphens
- or camelCase camelCase), the tool will usually automatically convert them to Python-style underscore naming (for example, zip-code will become zip_code, isActive will become is_active).
- The generated code is only Python class definitions and does not include data instantiation, JSON parsing, or serialization logic. To create class instances directly from JSON strings, users may need to add factory methods such as
from_dict themselves, or use libraries such as Pydantic to further enhance functionality.
