AI guide

Fix JSON from ChatGPT

Clean up JSON returned by ChatGPT or other AI tools when the response includes markdown fences, comments or invalid syntax.

Open AI JSON Repair

How to do it

  1. Remove surrounding explanation by pasting the whole response into the repair tool.
  2. Let the tool strip markdown fences and normalize common JSON-like syntax.
  3. Validate the result before sending it to your app, parser or workflow.

Recommended tool

AI JSON Repair

Fix broken JSON from ChatGPT, APIs, logs and config files with local repair and optional AI fallback.

JSONFree

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FAQ

Why does AI output invalid JSON?

Models sometimes include explanations, markdown fences or JavaScript-style syntax instead of strict JSON.

Can this handle code fences?

Yes. The repair tool strips common json and JavaScript code fences.

Should I ask AI to output strict JSON?

Yes. A strict prompt helps, but a repair step is useful when output still breaks.