Developer Kit
Developer
JWT Decoder
Decode JWT header and payload locally.
Runs locally in your browser. No upload.
Paste input, choose an action, then copy or download the result.
JWT
Paste or edit the source, then run the tool.
Decoded
Review the result, then copy or download it.
Result summary
Review the key fields below. Open developer details for the full raw JSON.
- Alg
- HS256
- Typ
- JWT
- Sub
- boringkit
- Scope
- tools
- Subject
- boringkit
- Scope
- tools
Developer details
{
"header": {
"alg": "HS256",
"typ": "JWT"
},
"payload": {
"sub": "boringkit",
"scope": "tools"
},
"claims": {
"issuer": null,
"subject": "boringkit",
"audience": null,
"scope": "tools",
"issuedAt": null,
"expiresAt": null,
"notBefore": null
},
"signature": {
"present": true,
"bytes": 7,
"verified": false,
"note": "Decoded locally only. Signature verification needs the issuer secret or public key."
},
"warnings": [
"Token has no numeric exp claim."
]
}