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Json Formatter Validator
Format and validate JSON with pretty-print and error reporting.
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It takes raw JSON text, validates it, and outputs a formatted (pretty-printed) version with consistent indentation. If the JSON is invalid, it shows the parser error instead.
Developers, API users, and anyone editing or debugging JSON by hand. It makes large payloads readable and catches syntax errors quickly.
It only checks syntax, not schema or business rules. Very large inputs may be slow in the browser; for huge files, use a local editor or CLI tool.
No. Parsing and formatting run entirely in your browser. Your data never leaves your device.
Paste minified JSON to expand it, or paste messy JSON to clean it. Use the error message to find the line and fix brackets, commas, or quotes.
