JWT Decoder & Debugger

Decode and debug JSON Web Tokens (JWT). View header, payload, and signature with formatted output.

All processing happens in your browser

Paste JWT Token:

Standard JWT Claims Reference

iss

Issuer - who created the token

sub

Subject - whom the token refers to

aud

Audience - who should accept the token

exp

Expiration - when token expires

nbf

Not Before - when token becomes valid

iat

Issued At - when token was created

jti

JWT ID - unique identifier

Frequently Asked Questions

Decode the Base64-encoded parts of JWT tokens manually

Generate hashes to understand JWT signature algorithms

Format and validate JSON data from JWT payloads