This is a little tool for checking links in HTML pages, using XHR. It has a very simple UI, but also gives an overview of the status codes.

You can easily configure it to check links by page or domain and even by page, by appending a query parameter. It also has a settings option for you to block links of a particular domain.

In order to do that, you will need to enter the URL of the domain you want to block, followed by a newline and then by a semicolon.

The tool supports both synchronous and asynchronous requests.