camel-converter

What it is and what it does

Camel Converter is a lightweight utility for transforming naming conventions between camelCase (used in JSON and JavaScript), snake_case (Python convention), and PascalCase. It operates on individual strings, dictionary keys, and class attributes, making it useful when bridging Python code with external APIs or data formats that use different naming standards.

The package provides standalone functions (to_snake, to_camel, to_pascal), dictionary converters (dict_to_snake, dict_to_camel, dict_to_pascal), decorators for automatic conversion on function return values, a base Converter class for adding conversion methods to custom classes, and an optional Pydantic integration (via the pydantic extra) that automatically handles case conversion in model serialization and deserialization.

Use it for:

• Parse JSON APIs that use camelCase keys into Python objects with snake_case attributes
• Convert Python dictionaries with snake_case keys to camelCase for JSON serialization to external services
• Decorate functions that return dictionaries to automatically normalize key naming conventions
• Build Pydantic models that accept camelCase input data and expose snake_case fields internally
• Create custom classes that serialize to camelCase while maintaining snake_case in Python code

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Converts strings and dictionary keys between camelCase, snake_case, and PascalCase formats, with optional decorator and Pydantic integration.

Yes. Zero runtime dependencies, permissive MIT license, active maintenance, and broad Python version support (3.10–3.14) make this a safe, low-friction addition. Install it when you need to bridge naming conventions between Python and external APIs or JSON data—the common case for web services and data integration work.

Install

camel-converter on PyPI

pip install camel-converter

uv add camel-converter

poetry add camel-converter

Installing camel-converter

Before you install

Low friction install with no runtime dependencies. Actively maintained as of 2026-03-05, marked Production/Stable, and supports current Python versions from 3.10 through 3.14.

License in practice

MIT License permits free use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.

Quickstart

pip install camel-converter

from camel_converter import to_snake, to_camel

snake = to_snake("myString")  # 'my_string'
camel = to_camel("my_string")  # 'myString'

Verify before relying

• Behavior when handling acronyms or consecutive uppercase letters (e.g., 'HTTPServer' → 'http_server' or 'h_t_t_p_server')
• Performance characteristics with deeply nested dictionaries or very large key sets
• Whether the optional Pydantic extra is compatible with Pydantic v2

Package facts

Evidence: camel_converter-5.1.0-py3-none-any.whl

Keywords: camel-case, converter, pydantic, python, snake-case

Tags

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