Question 1

What does a JSON formatter do?

Accepted Answer

It pretty-prints JSON with proper indentation and line breaks, making it human-readable. It also validates structure (finds missing commas, brackets, quotes), and can minify for production use.

Question 2

What's the difference between JSON and JavaScript objects?

Accepted Answer

JSON is stricter: keys must be double-quoted strings, no trailing commas, no comments, no undefined values, no functions. JSON is a data interchange format; JS objects are programming constructs.

Question 3

Why is my JSON invalid?

Accepted Answer

Common errors: trailing commas after the last item, single quotes instead of double, unquoted keys, comments (not allowed in JSON), or special characters not properly escaped with backslash.

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