JWT Decoder Online
Paste a JSON Web Token to inspect its header, payload and time-based claims locally in your browser.
JWT decoding notes
This tool decodes Base64URL sections of a token. It does not verify the signature or authenticate the token.
Is it safe to paste production tokens?
The decoding happens locally, but avoid sharing sensitive or active tokens whenever possible.
Why does signature verification matter?
Decoding shows claims, but only signature verification proves the token was issued by a trusted party.