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JSON Formatter / Validator
Paste any JSON payload to format it, minify it, or validate that it is syntactically correct.
Frequently Asked Questions
Trailing commas, unquoted keys, comments, and broken string escaping are common reasons.
How this calculator works
Formula explanation
The tool parses JSON and then either pretty-prints it, minifies it, or confirms validity.
Worked example
Example: {"a":1,"b":2} -> formatted JSON
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