JWT Debugger / Decoder
Decode and inspect JSON Web Tokens.
Encoded JWT
Header
// Decoded header will appear herePayload
// Decoded payload will appear hereSignature Verification
About the JWT Decoder
Quickly decode and inspect JSON Web Tokens (JWTs) right in your browser. This tool breaks down the JWT into its three parts—the header, payload, and signature—allowing you to easily view the contents and verify the signature.
JWTs are a common way to handle authentication, but they are Base64Url encoded, which makes them unreadable. This tool saves you time by instantly showing you the claims and metadata inside a token and validating its integrity. It's essential for debugging authentication issues or learning how JWTs are structured.