FSL Features


Security and Privacy

Short Links Abuse

Just like all the short link services, FSL can be abused by malicious users trying to hide the end destination of a short link, or to redirect to a malicious/phishing site.

Given the amount of malware circling around the internet today, FSL is doing its best to be as safe as possible.

We're performing checks to ensure that short links are safe when creating them, so that no bad link goes out hiding behind our short links.

However, no protection is 100% reliable, and if you find a short link that leading to unsafe site, please contact us and we'll take a look at it!

Google’s Federated Learning of Cohorts (FLoC) initiative

What the @&$! is FLoC?!

How do we fight FLoC?

Google is not testing/using FLoC in countries where GDPR is in place. For the rest, we're blocking the Google FLoC (Federated Learning of Cohorts) on our server to ensure our users are not being tracked by Google when visiting our site.

If you're interested in blocking the FLoC on your site, depending on the web server software you're using, you can out-out by including the following response header: Permissions-Policy: interest-cohort=().

Short Links

Short links are useful for sharing long links with others. You can use auto-generated shortlinks, or customize them.

Password-Protected Short Links

Protect your short links with a password. When using the password protection, the short link will be intercepted by the password-wall, preventing visitors to access the short link directly.

Password-protected short links are not expandable by using any link expanders.

Custom Short Links

Don't like the default short links? You can create your own! Instead of https://fsl.onl/28afG9, you can create https://fsl.onl/My-Fancy-Links.

Anonymous Redirection

We all know about the https://href.li :) We also let you hide the HTTP referrer header from any link.

Simply prepend the link with https://fsl.onl/ and you'll be redirected to the original link anonymously.

Here are some sites that show the HTTP referer header:

Anonymous Redirection Plugin for WordPress

You can use the FSL WordPress plugin to automatically convert all links form your content to the anonymous ones.
Grab it for free from here.

What it does behind the scenes?

In a nutshell, it uses the WordPress add_filter function to search and replace the non-WordPress links on the fly, without the need to edit the original content:

function fsl_anonymize_links($content)
    $str_link = 'href="';
    $str_link_anon = 'href="https://fsl.onl/';

    $content_anon = str_replace($str_link, $str_link_anon, $content);

    return str_replace('<a href="https://fsl.onl/'.get_site_url(), '<a href="'.get_site_url(), $content_anon);

add_filter('the_content', 'fsl_anonymize_links');

Free Account Limitations

At this moment, free accounts are limited to:

  • 100 short links per month 1
  • 50 custom short links 2
  • 10 Password-protected short links
  • Organize short links by category
  • 12 months history 3

1 Resets on the 1st day of each month at 00:00:00 UTC
2 Custom short links don't add up to the total number of available short links
3 Configurable - you decide whether you want the history or not

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