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Encode and Decode

JWT Decoder

Decode JWT header and payload without verifying the signature.

Local processing

This tool is designed to run in your browser. Do not paste secrets or production credentials into any online tool.

How to use this tool

Paste your input, choose an action, review the result, then copy the output when it looks correct. Invalid input shows a readable error instead of silently changing your data.

Example

Input

eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ.x

Output

Header:
{
  "alg": "HS256"
}

FAQ

Does this verify JWT signatures?

No. The MVP only decodes header and payload.

Should I paste production tokens?

Avoid pasting sensitive production tokens into any online tool.

Can it show expiration time?

Yes. Numeric exp, iat and nbf fields are shown as readable times.