Flask is a lightweight, micro web framework in Python used to build web applications. It provides the essential tools needed for web development, such as routing, request handling, and template rendering, while allowing developers to add additional components as needed. Flask follows a minimalistic and flexible approach, making it ideal for small to medium-sized projects where developers want more control over components like databases and authentication.
Django, on the other hand, is a full-stack web framework that follows the "batteries-included" philosophy, meaning it comes with built-in features such as an ORM (Object-Relational Mapper), authentication system, and admin panel. Django enforces a structured, convention-over-configuration approach, making it suitable for large, enterprise-level applications that require rapid development with less manual configuration.
The key difference is that Flask offers more flexibility and control, allowing developers to choose their own tools, whereas Django provides a pre-built structure, reducing development time but with less flexibility. Flask is preferred for lightweight applications and microservices, while Django is better suited for complex, data-driven applications requiring built-in security and scalability.