JSON Repair Tool
Repair malformed JSON strings automatically (quotes, trailing commas, brackets). Fast, free, and fully client-side.
Input source
Result / Output
How the JSON Repair Tool Works
Automatically repairs broken JSON by fixing single quotes to double quotes, adding missing quotes to unquoted keys, stripping trailing commas, and repairing unclosed brackets.
Usage Example
Fixes JavaScript object literals (e.g. `{ name: 'John', age: 30, }`) into standard valid JSON (`{"name": "John", "age": 30}`).
Frequently Asked Questions
What common errors can JSON Repair fix?
Single quotes, unquoted keys, trailing commas, comments, python `None`/`True`/`False` literals, and missing enclosing braces.
Browse more
See all JSON tools.