How to Format JSON for APIs and Config Files Without Common Errors

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A guide on DEV Community explains how to keep JSON valid and easy to debug when working with APIs and configuration files. It outlines JSON's stricter syntax rules compared with JavaScript, such as requiring double quotes and forbidding trailing commas and comments. The article distinguishes formatting, which adds whitespace for readability, from minifying, which shrinks payloads for transfer, and from sorting keys, which eases comparison. It lists frequent mistakes like trailing commas, single quotes, and invisible characters copied from word processors. The author also notes that formatting checks syntax only, so JSON Schema is recommended for validating structure and types.

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