Diagnose your JSON
Provide a URL to fetch and inspect, or paste JSON text directly. Parsing is always client-side for pasted text — nothing leaves your browser.
Fetched server-side. Hosts behind Cloudflare may appear unreachable.
Platform limits: This tool runs on a Cloudflare Worker. A host that is itself behind Cloudflare’s network cannot be reached from here — such hosts will appear as unreachable rather than closed. Responses are fetched with a 15-second timeout and bodies over 2 KB are truncated in the preview.