JWT Verifier
Verify JWT signature and inspect claims
π 100% client-side β your data never leaves this pageJWT Token
Secret (HS256)
Verification
Verification result will appear here
π 100% client-side
About this tool
Verify JWT signatures and inspect token claims in one place. This tool supports common HS256 verification and none tokens for debugging, while displaying important fields like exp and iat in readable time formats. It is ideal for auth troubleshooting and token lifecycle checks during API development.
Frequently Asked Questions
Which JWT algorithms are supported?
This version supports HS256 verification and none tokens for debugging scenarios.
Can it show token expiration time?
Yes. It converts exp and iat claims into readable timestamps for quick inspection.
Does verification require sending secret to server?
No. Signature verification happens entirely in your browser.