Developer / Auth
JWT Decoder
Decode JWT header and payload locally in your browser to inspect claims and timestamps. Decode JWT header and payload locally in the browser to inspect claims, timestamps, and token structure.
3
Segments
Yes
Header
Yes
Payload
Present
Signature
Loaded starter token
Quick notes
This tool decodes readable parts of the token locally in your browser.
It does not validate the signature or verify whether the token is trustworthy.
Expired 525691 minutes ago
Claim summary
sub
toolport-user
name
Toolport Demo
role
admin
Header
{
"alg": "HS256",
"typ": "JWT"
}Payload
{
"sub": "toolport-user",
"name": "Toolport Demo",
"role": "admin",
"iat": 1753680000,
"exp": 1753683600
}Issued at
2025-07-28T05:20:00.000Z
Monday, July 28, 2025 at 5:20:00 AM UTC
Expires at
2025-07-28T06:20:00.000Z
Monday, July 28, 2025 at 6:20:00 AM UTC
Expired 525691 minutes ago
Signature
signature
Why this gets reused
JWTs show up constantly in auth debugging, API sessions, browser storage, and local development.
Reading claims and timestamps quickly is often more useful than handling the token as an opaque string.
Copy-ready header and payload blocks make it easier to inspect or share sanitized details.
Strong first-use cases
Checking whether a token already expired.
Inspecting claims like role, subject, issuer, or audience during API debugging.
Reading stored JWT payloads without sending them to another service.