RedCaptcha doesn't appear on mobile

3 posts, 1 answers
  1. Igor
    Igor avatar
    2 posts
    Member since:
    Jan 2016

    Posted 27 Jan 2016 Link to this post

    I am using RedCaptcha on registration page and it works ok, but if i open this page from mobile device (or emulating it in browser) the redcaptcha image doesn't appear. If i open link from captcha src="" attribute in new tab i see the image.

    You can see this issue by this url:

    Maybe you have faced such issue earlier. 
    Any help will be appreciated

  2. Answer
    Marin Bratanov
    Marin Bratanov avatar
    5539 posts

    Posted 01 Feb 2016 Link to this post

    Hi Igor,

    When anonymous access ( is enabled and the page is viewed from a mobile browser, the HttpHandler that serves the captcha image should be requested in a folder that can be accessed by anonymous users. If the HttpHandler is not configured, the image will not appear.

    You should open the page with the captcha and use the HttpHandlerUrl property of the control to configure it to request Telerik.Web.UI.WebResource.axd in a folder that is accessible, for example _layouts: 

    <telerik:RadCaptcha ID="RadCaptcha1" Runat="server" ForeColor="Red"
     ErrorMessage="You have entered an invalid code." HttpHandlerUrl="~/_layouts/Telerik.Web.UI.WebResource.axd">


    Marin Bratanov
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  3. Igor
    Igor avatar
    2 posts
    Member since:
    Jan 2016

    Posted 01 Feb 2016 in reply to Marin Bratanov Link to this post

    HttpHandlerUrl="~/_layouts/Telerik.Web.UI.WebResource.axd" solved my problem.

     Thank you, Marin!

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