JWT Decoder
Decode and verify JSON Web Tokens. View header, payload, and signature information securely in your browser.
Common JWT Claims
iss
Issuer - Who created the token
sub
Subject - User or entity ID
aud
Audience - Intended recipient
exp
Expiration Time - Token expiry
nbf
Not Before - Valid from time
iat
Issued At - Creation timestamp
jti
JWT ID - Unique identifier
role
User role/permissions
scope
Access scope/permissions
Why Use Our JWT Decoder?
100% Client-Side
All decoding happens in your browser. Your tokens never leave your device.
Visual Breakdown
See the token structure with color-coded header, payload, and signature.
Timestamp Parsing
Automatically converts Unix timestamps to human-readable dates.
Security Notice
This tool only decodes JWT tokens - it does NOT verify the signature. Decoding a JWT shows you the claims, but doesn't prove the token is authentic. Always verify the signature on your server using the secret key before trusting any claims. Never share your JWT tokens publicly as they may contain sensitive information.