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Home · Free Tools · JSON Repair / Formatter

JSON Repair / JSON Formatter

Paste broken, truncated or LLM-generated JSON and get valid, pretty-printed JSON in one click. Fixes trailing commas, unquoted keys, single quotes, missing brackets and more.


      

    


    

      
Daily free limit reached

      
You've used your 5 free repairs today. Continue pay-per-use via the DeFi Intel Agent Gateway API (from $0.001/call), or add a prepaid API key above for unlimited calls.

      

        API docs & how to pay
        Pay per call (x402)
      

    


    

      
Need JSON repair at scale?

      
The same engine powers an MCP/API gateway: 40+ paid microservices on USDC (Base), no API keys required for pay-per-call, 8 networks. Free samples daily.

      

        Explore the API
        More free tools
      

    


    

      
Frequently asked questions

      
What does the JSON repair tool fix?
It repairs common malformations: trailing commas, unquoted keys, single quotes, missing braces or brackets, truncated JSON from LLM output, duplicate commas, and stray text around a JSON object. It returns valid, pretty-printed JSON.

      
Is the JSON repair tool free?
Yes — 5 repairs per day per IP are free, no signup. After the free daily limit you can continue pay-per-use via the DeFi Intel Agent Gateway API (from $0.001 per call) or with a prepaid API key.

      
Does my JSON leave the browser?
The text you paste is sent to the repair API to be processed and returned; we do not store it. For sensitive data use the "Format locally" button, which runs entirely in your browser, or your own API key.

      
Why do I get broken JSON from AI tools?
Large language models often truncate long outputs, use single quotes, omit commas or close brackets early. This tool is built to recover valid JSON from exactly those failure modes.

    


    
Powered by the DeFi Intel Agent Gateway (x402/MPP, USDC on Base). Free tier: 5 calls/day/IP. Prices from $0.001/call. This is a utility tool — JSON is processed transiently and not stored.