A SAML Response can be signed in different ways:
With this tool, paste an unsigned SAML Response, provide the private key and the public X.509 certificate and get the SAML Response signed in the selected "mode."
Any private key value that you enter or we generate is not stored on this site or on the OneLogin platform. Also, notice that this tool is provided via an HTTPS URL to ensure that private keys cannot be stolen.
For extra security, please do not use production keys on this site.