I’ve done a rewrite of the old webbased SAML 2.0 debugger, which will help you to decode the various SAML bindings for easier debugging SAML messages.
I hope you like it.
This tool is part of the Federation Lab suite of test, validation and debugging tools for Identity protocols, such as SAML and OpenID Connect. Please contact me about any problems or bugs with the tool.
You may also be interested in the SAML-tracer Firefox Plugin.