Repair and fix broken JSON data online. Automatically detect and correct syntax errors, missing quotes, trailing commas, and other common JSON issues.
About this tool
It can fix missing or extra commas, unquoted keys, single-quoted strings, missing brackets or braces, and other common JSON syntax issues.
The repairer only fixes syntax errors — adding missing brackets, quotes, or commas as needed. Your actual data values remain completely unchanged.
If the input is too corrupted to recover automatically, an error message will be displayed and the output will remain empty.
No, all processing is done locally in your browser. Your data never leaves your device.