Processed in-browser · nothing sent to a server

JWT Decoder & Signature Verifier

Paste a JSON Web Token to instantly decode its header, payload and signature, and verify HMAC (HS256) tokens with your secret. Algorithm and claim references included.

AG JWT Decoder — Decode & verify JSON Web Token, algorithm & claim reference

JWT token

—

Header Payload Signature

decoded

Header · header

—

Payload · payload

—

Signature · signature

—

HMAC signature verification

Enter the secret of an HS256/384/512 token to verify its signature in your browser.

claims

Claim	Value / Time

Processed in-browser Instant decode HMAC verification Completely free