Diagnose your JSON
Paste a URL to check what a server actually returns, or paste JSON directly to find where it breaks — all in plain language.
Cloudflare limitation: A host behind Cloudflare cannot be reached from this Worker. If the target domain uses Cloudflare, the result will show the fetch as failed with "not established" — the server may be reachable from your browser directly.
Fetching and analysing response...
Parsing happens in your browser. The JSON you paste here is never sent anywhere — it is parsed entirely on your device. No data leaves your computer.