Unblock Sites is a Chrome extension that allows users to bypass domain name blocks using Google Public DNS. Developed by an anonymous developer, this free extension provides a simple solution for accessing blocked websites.

With Unblock Sites, you can retrieve the correct IP address of a blocked site using Google Public DNS and directly connect to the website by entering its IP address in the address bar. This bypasses any restrictions imposed on the domain name, allowing you to access the blocked content.

It's worth noting that some sites only work over HTTPS. When accessing these sites, you may encounter a "your connection is not private" warning. However, you can easily bypass this warning by clicking "advanced" and "proceed".

One limitation of Unblock Sites is that it won't work on servers using HTTP/2. Additionally, reCAPTCHA may not function properly on most sites. However, you can look for a "having problems with the captcha" link or alternative methods to overcome this issue.

Overall, Unblock Sites offers a convenient way to access blocked websites by bypassing domain name blocks using Google Public DNS. It's a useful tool for those facing restrictions and limitations while browsing the web.