Link Target Checker

The `target="_blank"` Vulnerability

When you link to another website using target="_blank" to open it in a new tab, you are inadvertently granting that new page partial access to your original page.

Specifically, the new page can access the window.opener object. A malicious site could use this to redirect your original page to a phishing site (a "reverse tabnabbing" attack) or to degrade the performance of your original page since they may run on the same thread.

The Solution

Always add rel="noopener" or rel="noreferrer" to any external links that open in a new tab:

• noopener: Prevents the new page from accessing the window.opener object. (Supported in all modern browsers).
• noreferrer: Also prevents the new page from accessing the window.opener object, but additionally prevents the browser from sending the Referer HTTP header to the new site (hiding where the traffic came from).

Note: Modern browsers (Chrome 88+, Safari 12.1+, Firefox 79+) now implicitly set rel="noopener" on links with target="_blank" by default. However, it is still a best practice to include it explicitly for backward compatibility and to enforce strict security standards in your HTML.