JWT Decode

Input token Output

Decoded result:

Header:

Payload:

Signature:

About JWT

1) JWT (JSON Web Token) is an open standard for compact, self-contained JSON objects for secure transmission.
2) Composed of Header, Payload, and Signature.
3) Commonly used for authentication and information exchange.
4) Compact, self-contained, and privacy-friendly.

How to Use

What this tool does

Decodes a JWT into its Header, Payload, and Signature for inspection. No verification is performed.

Steps

Paste a JWT (three Base64URL parts separated by dots) into the input.
Click Decode to view the JSON header and payload, and the signature bytes.

Examples

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9... → shows alg: HS256, typ: JWT.

Notes

This tool does not verify the signature. Use server‑side libraries to verify.
Payload may be untrusted; do not rely on it without verification.
Processing is local in your browser.