What a JSON formatter does
A JSON formatter takes compact or messy JSON and presents it with consistent indentation. This makes keys, arrays, nested objects, and values easier to review before you copy the payload into documentation, tests, or a debugging note.
How to use it well
Paste JSON, format it, then scan the structure for missing fields, unexpected nesting, and sensitive values. Formatting improves readability, but it does not confirm that an API accepts the payload or that the business meaning is correct.
Common mistakes
Do not treat formatted JSON as production-ready just because it is readable. Also avoid pasting tokens, private keys, or customer data into online tools unless the processing label is clear.
FAQ
Does formatting change data?
A correct formatter should preserve values and only change whitespace.
Does a formatter validate JSON?
Many formatters parse before formatting, but validation and formatting are different tasks.