Most common invalid JSON problems
- - Trailing commas after the last item in an object or array.
- - Single-quoted strings copied from JavaScript, Python, or docs.
- - Unquoted object keys such as `status: ok` in logs or pseudo-code.
- - Non-JSON literals like `True`, `False`, `None`, `undefined`, or `NaN`.
Recommended repair workflow
- 1. Start with JSON Repair to turn common syntax issues into valid JSON.
- 2. Use JSON Validator next if you still need precise error feedback.
- 3. Use JSONPath Tester when you need to verify selectors or inspect matched fields.
- 4. Use JSON Diff to compare before and after structures and focus on real changes.
When Repair is especially useful
- - You copied a partial API response and need to keep debugging immediately.
- - You received JSON-like text from Python, logs, monitoring tools, or chat threads.
- - You want to clean up invalid JSON before formatting, querying, or diffing it.