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Decode JSON Web Tokens (JWT) client-side in browser memory. Inspect token headers, payload claims, expiration timestamps, and signature hashes without transmitting secrets.
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "Alex Rivera",
"email": "alex@example.com",
"role": "admin",
"iat": 1516239022,
"exp": 1916239022
}4peZ_4peZ4peZ4peZ
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Decode and debug JSON Web Tokens instantly. Inspect standard claims including subject (sub), issuer (iss), audience (aud), and expiration (exp) safely inside your browser.
Yes. This decoder executes 100% locally in your browser using standard Base64Url decoding. Tokens are never sent over the network or stored in any database.
No. Client-side decoding inspects claims only. Cryptographic signature verification must always be performed by your authorized backend server using the secret key.
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