SameSite Cookies Tester

Manual SameSite Cookie Test

Perform a cross-site request back to to test the SameSite cookie attribute:

Cross-site GET request

Cross-site iframe

These links/button initiate a cross-site request back to, which will allow you to see which cookies the browser adds to the request. Your Browser Developer Tools will allow you to monitor the cookies being sent.

Available Tests

An experiment by Stephen Rees-Carter for "CSRF is dead (or is it?)" and "SameSite Cookies Deep Dive".
Source Code on GitHub, PRs welcome.