Tool · client-side · no signup
JWT Decoder & Inspector.
Decode any JSON Web Token (JWT) in your browser. Inspect the header, claims payload, signing algorithm, and check expiry. Your token never leaves your device — all decoding happens client-side.
Your token is decoded entirely in your browser. Nothing is sent to a server.
Decoded output appears here
Paste a JWT in the left pane. The decoder runs locally; nothing is sent anywhere.
What this is good for
Typical use cases.
Decode an access token returned from your IdP
Inspect the `aud`, `iss`, `sub`, and `exp` claims
Confirm which signing algorithm an OAuth provider is using
More tools
SAML decoder. OAuth visualizer. SCIM validator.
The full set of free single-purpose tools — token decoders, protocol visualizers, validators — is at /tools/.