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JSON Formatter Online
Pretty-print JSON with readable indentation.
Format compact or messy JSON into an indented structure that is easier to inspect. Paste the input, make the change, then read the result before you copy it elsewhere.
Validate before relying on the formatted output.
Ready — input is processed locally.
This utility runs on the current device for the supported workflow. Kaazo does not need the pasted input to calculate the result.
JSON Formatter: the job it actually does
Format compact or messy JSON into an indented structure that is easier to inspect.
Valid JSON is stricter than JavaScript object syntax
Quoted property names, legal escape sequences and balanced arrays/objects matter. Comments, trailing commas or unquoted keys may look familiar in code but aren’t valid JSON.
Formatting changes whitespace, not the underlying values. Invalid JSON needs to be corrected before it can be safely pretty-printed.
Where JSON Formatter fits cleanly
One straightforward use is to inspect API responses. Another is to format configuration files. The common thread is that the input already contains the information the tool needs.
Where JSON Formatter stops
Use a JavaScript formatter when the input is JavaScript rather than JSON. Formatting can improve readability, but it can’t make semantically wrong data correct.
FAQ
What does JSON Formatter actually do?
Format compact or messy JSON into an indented structure that is easier to inspect.
What limitation matters most?
Quoted property names, legal escape sequences and balanced arrays/objects matter. Comments, trailing commas or unquoted keys may look familiar in code but aren’t valid JSON. Formatting changes whitespace, not the underlying values. Invalid JSON needs to be corrected before it can be safely pretty-printed.
Does formatted or converted output prove the data is valid for my application?
No. JSON Formatter can perform the syntax or data operation described here, but your application can still impose its own schema, business rules, encoding or security requirements.
Related tools
After JSON Formatter, validate the output before feeding it into another transform. The data-format guide has broader context if you need it.