About JSON Beautifier

JSON Beautifier repairs and formats broken JSON by adding missing quotes to keys and string values, then pretty-prints the result so it is easy to read and debug.

• What does JSON Beautifier do? Automatically fixes common JSON mistakes such as missing quotes around keys or string values, then formats the JSON with consistent indentation.
• How does it work? The tool first performs a conservative pass to add missing quotes where it is unambiguous, then attempts to parse the result. If parsing succeeds it pretty-prints the JSON; otherwise it reports helpful error information.
• Supported fixes Adds quotes to unquoted object keys, wraps unquoted string values in quotes, and normalizes whitespace and indentation. Also provides helpful error messages if more complex structural issues remain (missing commas, unmatched braces).
• Limitations The beautifier uses heuristics and cannot resolve deeply ambiguous or heavily malformed input (for example when values contain spaces or punctuation that could be mistaken for multiple tokens). Always review the output before using it in production.
• Examples Input: { key:value } → Output: { "key": "value" } Also fixes arrays and nested objects when quotes are simply missing.
• Tips If the beautifier still fails, try to add missing commas or simplify the input, then run the tool again. Use the Download/Copy buttons to export cleaned JSON.
• Privacy All processing runs locally in your browser — nothing is sent to any server.

Tip: This tool helps fix common mistakes quickly but is not a substitute for validating JSON schema when correctness is critical.