Decode JWT header and payload locally, inspect claims, and keep token contents in the browser.
JWT Token
Paste a full JWT here to decode its header and payload instantly.
Validation
Valid JWT structure
Header
36
Payload
171
Signature
9
Header
Payload
Claim Summary
Algorithm
HS256
Type
JWT
Subject
1234567890
Issuer
https://testurl.dev
Issued At
2018-01-18T01:30:22.000Z
Expires At
2030-09-21T16:37:02.000Z
Signature
Bytes
9
Raw length
12
Raw Signature
c2lnbmF0dXJl
Hex
7369676e6174757265
Text Preview
signature
How To Use
Paste a full JWT into the token editor. The tool decodes the header and payload locally in the browser and leaves the token on-device.
This tool inspects structure and claims and can decode signature bytes for inspection. It does not verify the signature against a secret or public key.
Use the decoded header and payload panes to inspect algorithms, issuers, timestamps, subjects, and custom claims quickly.