JSON Formatter & Validator
Beautify, minify, and validate JSON with clear error messages.
Valid JSON
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Formula & methodology
Parsed with the native JSON parser and re-serialized. Invalid input surfaces the exact parser error.
Worked example
- {"a":1} → {\n "a": 1\n}
Frequently asked questions
Is my JSON uploaded anywhere?
No. Parsing and formatting happen entirely in your browser.
Does it support comments?
No. Standard JSON does not allow comments.
Privacy
All processing happens locally in your browser. Your data is never uploaded.