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Editorial Team
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Asked: 2026-06-12T16:14:33+00:00

I wrote a small test page to grab document.referrer of users with javascript and

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I wrote a small test page to grab document.referrer of users with javascript and send it to a simple log server (like sendReferrer(document.referrer)).

The referrer Firefox sends is always url-encoded, (eg. ‘http://www.google.com/search?q=%C3%9C’ when referrer url is http://www.google.com/search?q=Ü)

But some clients (like IE9 on Win7) sends urls without url-encoding (www.google.com/search?q=Ü)

Is document.referrer is url-encoded in all browsers? Is this reliable (part of any standard) or not?

UPDATE: In Firefox15/Chrome21 (on ubuntu) document.referrer is url-encoded

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1 Answer

  1. Editorial Team

    My final answer for this question: Referer may/may not be encoded! With my tests some (only some!) IEs send unencoded referrers (I guess it depends on the locale of client system)

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