CSV vs. JSON: Which Data Format Should You Use?

Data serialization formats are not one-size-fits-all. Choosing between CSV and JSON depends heavily on your specific use case.

CSV: The King of Density

CSV (Comma-Separated Values) is incredibly lightweight. It's essentially a flat table where each line is a record.

• Pros: High data-to-metadata ratio, easily readable by non-technical software (Excel, Google Sheets).
• Cons: No support for hierarchy, limited data typing (everything is a string or number).

JSON: The Language of the Web

JSON (JavaScript Object Notation) is the industry standard for APIs and configuration.

• Pros: Supports nested structures, arrays, and explicit null values. Native to JavaScript.
• Cons: Larger file size due to repeated key names in every object.

When to Convert?

You should convert your CSV to JSON when:

1. You need to consume data in a web application.
2. You need to represent complex relationships (like a user having multiple addresses).
3. You are sending data to a NoSQL database like MongoDB or Firebase.