JWT Decoder

Free online JWT decoder. Decode and inspect JSON Web Tokens including header, payload, and signature.

cybersecurityFree & Private

Input

Output

FAQ

What is JWT?▼

JWT (JSON Web Token) is a compact token format for securely transmitting information between parties.

Is decoding a JWT secure?▼

Decoding is safe (it's Base64), but validating the signature requires the secret key. Always verify signatures server-side.

Use Cases

API Debugging

Inspect token contents during development

Authentication Testing

Verify JWT payload structure and claims

Examples

Decode Token

Input:

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

Output:

Decoded header, payload, and signature