SAML Response Validator
Debug a SAML Response: check status, timing, audience, recipient, InResponseTo, issuer, and signature presence — and find out why your SSO login is failing
Validation runs entirely in your browser. The SAML response you paste — including live assertions — never leaves this page.
Note: This validator checks structure and timing (the cause of most SSO failures) and reports whether a signature is present. It does notcryptographically verify the XML signature — that requires canonicalization and your IdP's certificate. A clean report is not proof the signature is valid.
Related tools
SAML Decoder
Decode SAML Requests/Responses from Base64 to readable XML
SAML Metadata Parser
Parse SAML Metadata XML and extract IdP/SP configuration
SAML Certificate Inspector
Inspect X.509 certificates from SAML metadata, responses, or PEM
SAML Assertion Builder
Generate test SAML Responses, AuthnRequests, and LogoutRequests
SAML Metadata Generator
Generate SAML 2.0 EntityDescriptor metadata XML for SPs and IdPs