JSON Formatting and Validation Best Practices

Formatting is not validation

Formatting changes whitespace so nested objects and arrays are readable. Validation checks whether the input follows JSON syntax. A formatter may fail because the document contains a trailing comma, unquoted key, comment, or mismatched bracket.

Use predictable indentation

Two spaces is a common balance between readability and line length. Keep formatting consistent within a repository and let automated tooling handle it rather than adjusting whitespace by hand.

• Use double quotes for keys and string values.
• Remove trailing commas and comments.
• Keep numbers and booleans unquoted when they are not strings.
• Do not paste secrets or credentials into untrusted tools.

Debug invalid JSON

Start with the first reported syntax error because later errors may be consequences of it. Check the surrounding property separator, quotes, and closing braces, then validate again after each correction.