Developer Tool

JWT Decoder

Decode JWT headers and payloads instantly. Everything runs locally in your browser.

Token Inspector

Waiting

Paste a JWT to inspect its header, payload, signature, and time claims without sending the token anywhere.

JWT input0 chars

Header

Payload

Signature

Signature segment will appear here.

Decode and inspect JWTs in your browser.

Use this JWT decoder to inspect token headers, payloads, signatures, and time-based claims like issued-at and expiration dates. Decoding runs locally in your browser, so tokens are not sent to a server.

What can this JWT decoder inspect?

Decode JWT headers and payloads into readable JSON.
Inspect the token signature segment.
View common time claims like iat and exp.
Check whether an expiration claim is still active or expired.