JSON Syntax

Are json keys case sensitive?

Yes, JSON keys are case-sensitive, meaning "name", "Name", and "NAME" are treated as three different keys. This is an important consideration when designing APIs and exchanging data between systems. A JSON object like {"Name": "John", "name": "Jane"} has two distinct properties, which can lead to confusion and bugs. When working with APIs, ensure consistent key casing across your application to avoid data mismatches. Most style guides recommend using camelCase or snake_case consistently. Case sensitivity affects data retrieval, serialization, and deserialization processes. When consuming external APIs, pay attention to the exact casing of keys in documentation. Many developers adopt naming conventions to prevent case-related errors and maintain code consistency throughout their projects.
Last updated: December 23, 2025

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