Guides

Short, specific write-ups of the problems these tools exist for. Each one explains the failure, why the obvious fix is risky, and which tool ends the job.

• How to fix a trailing comma in JSON
  A comma before a closing brace or bracket makes JSON fail to parse. Why it happens, why search and replace is unsafe, and how to remove it correctly.
• How to check a JSONL dataset before fine-tuning
  Find malformed lines, duplicate records, overwritten keys, and chat-format mistakes in a JSONL training file before a fine-tuning job rejects it.
• How to repair many broken JSON files in one pass
  Repair a batch of small JSON documents in one request, with a separate result for every named item and the limits to script against.