100% private in-browser JWT debugger. Decodes header & payload, verifies signatures, and computes live relative token expiration.
Never. Decoding, payload parsing, and signature verification are executed 100% in client-side browser memory. Zero telemetry or server calls are made.
The inspector extracts the "exp" timestamp claim and calculates live human-readable countdowns (e.g. "Expires in 2 hours" or "Expired 3 days ago") in your local timezone.