Dekoder / Enkoder JWT - Weryfikacja i podpisywanie tokenów

Czym jest JWT?

JSON Web Token (JWT) to otwarty standard (RFC 7519) do bezpiecznego przesyłania informacji między stronami jako obiekt JSON.

How This Tool Works

This tool decodes the Base64Url-encoded Header and Payload of a JWT to display the JSON contents. It also parses standard claims like expiration time (exp), issued at (iat), and others into human-readable formats. All decoding happens entirely in your browser — your tokens are never sent to any server.

Common JWT Claims

• iss (Issuer): Who issued the token
• sub (Subject): Who the token is about
• aud (Audience): Intended recipient
• exp (Expiration): When the token expires
• iat (Issued At): When the token was created
• nbf (Not Before): Token is not valid before this time