Simple Ways to Validate and Format JSON Before Making API Requests

JSON is a widely used data format in APIs, but minor syntax errors like missing commas, unmatched brackets, or single-quoted strings can cause requests to fail. Valid JSON requires double quotes for all property names and string values, with correctly paired curly and square brackets throughout. Developers can validate JSON programmatically in JavaScript using JSON.parse(), which throws a catchable error when the input is malformed. Formatting minified JSON into a human-readable, indented structure makes it easier to spot mistakes without altering the underlying data. Browser-based JSON formatting tools offer a quick way to inspect and validate payloads without needing a dedicated development setup.