Cerberus
The Cerberus library validates data in Python with a lightweight and extensible design.
About Cerberus
Cerberus is an open source data validation library for Python. It checks data, such as dictionaries, against defined schemas and includes type checking and base validation functionality, with support for custom validation rules.
It has no dependencies and installs from PyPI with pip. From version 1.2 it follows semantic versioning, with releases tested against CPython interpreters and the most recent PyPy interpreter.
Key features
- Validates Python dictionaries against defined schemas
- Provides built-in type checking and base validation functionality
- Supports custom validation rules through extensible design
- Has no external dependencies
- Installable from PyPI via pip
- Tested against CPython and recent PyPy interpreters
Best for: Python developers who need to validate data with custom rules and no added dependencies.
Good for
- Has no external dependencies
- Extensible design allows custom validation
- Open source under ISC license
Cerberus at a glance
- Website
- github.com/pyeve/cerberus
- Category
- Development › Developer Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
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Cerberus FAQ
How do I install Cerberus?
Run pip install cerberus to install it from PyPI.
Does Cerberus require other packages?
No, it has no dependencies.
Which Python interpreters are tested?
CPython interpreters until at least half a year after end of life and the most recent PyPy interpreter.
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