Decode Tokens
Decode JWT header and payload without uploading the token.
JWT Decoder
Decode JWT header and payload JSON locally with expiry status and copy-ready output.
Local DecodeExpiry CheckCopy JSON
JWT decoder
Inspect token header, payload, and expiry locally.
Token
143 chars
This decodes token contents only. It does not verify the signature.
Decoded JWT
Header and payload decoded locally.
Valid until 12/31/2033, 10:13:20 PM
Header
{
"alg": "HS256",
"typ": "JWT"
}Payload
{
"sub": "1234567890",
"name": "AidenGPT",
"iat": 1717460000,
"exp": 2019680000
}Signature
signatureCapabilities
What this tool handles
Use JWT Decoder to check the input, tune the settings, and copy a clean output.
Expiry Status
Read exp claims and see whether the token is expired.
Copy JSON
Copy formatted header and payload JSON.
Workflow
Run it in three steps
Decode JWT header and payload data locally.
1
Paste Token
Paste a JWT into the input area.
2
Review JSON
Read the decoded header and payload JSON.
3
Copy Output
Copy the formatted JSON for debugging.
Good for
Common jobs this tool supports
Local DecodeToken content stays in your browser
Header and PayloadDecodes both JSON sections
Expiry StatusChecks exp claim when present
Copy JSONCopy formatted decoded output
FAQ
Answers before you run it
Practical notes about output, privacy, and common settings.
No. It decodes the header and payload only. Signature verification requires the correct secret or public key.
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