AndyO Blog

Saturday, October 31, 2015

Facebook: "You can't post this because it has a blocked link":

After spending at least 6 hours troubleshooting, I've finally discovered why Facebook was blocking URLs to my website.

The problem:

When trying to share or save a URL from my website on Facebook, I saw the error:

The content you're trying to share includes a link that our security systems detected to be unsafe:
Please remove this link to continue.

The unsafe link ( was not on my website, and didn't appear to be called by any scripts.

The Solution

In my case, this error was caused by a missing favicon, a graphic image that is used in the address bar, tabs, and taskbar that provides a visual reminder of the website. According to, the correct placement of the preferred code is this:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "">

<html lang="en-US">

<head profile="">

<link rel="icon"



What was really strange was that I could share some pages, but not others. I finally noticed (after a lot of research) that the pages I couldn't share didn't include a favicon. Once I added this code, I could share the page.

I'm not sure why having the favicon code is important to sharing on Facebook. As far as I understand, favicons are not required. This looks like a bug in Facebook's system.

Read more about favicons.

Details and troubleshooting

Here's some more detailed information about this issue.

Screenshot of error:


Pasting "" resolves to


Troubleshooting steps:

  1. I wrote to Facebook (per their instructions), and didn't hear back.
  2. I Googled variations on "" and "" and couldn't find anything related to Facebook.
  3. I found a lot of search utilities to check URLs, but I couldn't find anything wrong with my site (here's a helpful page:
  4. Facebook's debugger didn't provide any clues.
  5. I wrote to my website hosting company -- just in case there was a problem on the server -- and they wrote back to say the problem was with Facebook.
  6. Finally, I found this website that included the following:

When I looked at my website, I saw that the pages I couldn't share didn't have a favicon. As soon as I added a favicon, I could share.

Hope this is helpful for others having this problem.

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posted by AndyO @ 5:09 PM   0 comments