What does JSONFix.tech do?

JSONFix.tech automatically repairs broken JSON produced by AI models like ChatGPT, Claude, and Gemini. It fixes trailing commas, unquoted keys, undefined values, markdown code fences, and other common LLM output errors — in one click.

Is my JSON data private?

Yes. The repair engine runs entirely in your browser — your JSON never leaves your device. Only the optional AI explanation feature sends data (encrypted) to our AI provider for analysis.

What AI powers the explanation feature?

The AI analysis tabs (Fixes, Explain, Schema, LLM Scan) are powered by AI via structured output generation.

AI JSON Surgeon

|Paste broken JSON · Click Auto-Fix · Get perfect JSON + explanation

🔒 Repair is 100% client-side✨ AI-powered⚡ Your JSON never stored

Input — Broken JSON

Output — Fixed JSON

⌘↵ to fix · ⌘K to clear

+Active Assistant

🔒 Repair is 100% client-side · AI explanation is opt-in

🤖

Paste broken JSON and click

Auto-Fix with AI

4 AI-powered analysis tabs