JSON Repair

Data that claims to be JSON often has small deviations from the spec: a trailing comma, single quotes, unquoted keys, Python literals like True/False/None instead of true/false/null. This tool fixes such issues automatically and lists every fix it applied.

How to use it

• Paste broken JSON and the tool immediately tries to fix syntax issues and shows the valid result.
• The list below shows each applied fix separately, so you can check exactly what changed.
• If it can't be repaired (the structure is too damaged), the tool points to the exact line where parsing stopped.

Common uses

• Fixing JSON copied from logs or a console, where strings may have been truncated or escaped incorrectly.
• Converting a Python-style dict (with True/False/None and single quotes) into valid JSON.
• Parsing an LLM response that promised JSON but added a comment or a stray comma.

Things to keep in mind

The tool only fixes syntax errors — it won't catch a broken data structure (a missing field, swapped values), since that kind of JSON is still syntactically valid.

If the damage is severe enough (a string cut off mid-way, for example), the automatic fix can produce an unexpected result — always check the output before using it.