Client-side only · Token never leaves your browser
Signature verification requires your secret key
Paste JWT Token
—Algorithm —Type —
Header✓ copied
Paste a JWT to decode the header
Payload✓ copied
Paste a JWT to decode the payload
Standard Claims
Signature (encoded)
Note: This tool decodes the header and payload only.
Signature verification requires your secret key or public key and cannot be done client-side without it.
Never paste a production JWT into any online tool you do not control.