HTTP headers

This tool will help you see that a URL returns correct headers for example when validating post URLs, 301s, or content security policies.

Click here to test it with an example! Can you spot a custom header? I added it to the site in january 2021. Hopefully it's still there. Unfortunately they have removed the custom header. For 5 years the server of Finnish hockey team HIFK returned HIFK-FANS: Toinen puoli huutakaa meille! that refers to what their fans usually shout at games.

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