JWT Verifier (HS/RS/ES + JWKS)

Verify JWT signatures locally with shared secret, PEM public key/certificate, or JWKS key sets.

UI mode

JWT token

Key source

Shared secret

PEM public key or certificate JWKS JSON

JWKS URL

Ignore header kid and use first compatible JWKS key

About This Tool

This free online JWT Verifier validates token signatures for HS, RS, and ES algorithm families. You can verify with a shared secret (HMAC), a PEM public key or certificate, or a JWKS key set. It is useful for API debugging, identity integration testing, and auth troubleshooting.

The verifier also decodes header and payload claims so you can inspect token metadata while validating integrity. Processing runs in your browser and does not require sending tokens to external services.