Feed43.com is relatively well-known in the application of HTML2RSS. Its advantage lies in the fact that as long as you understand HTML, you can set up several wildcards within the same code block to replace the required information, allowing for the extraction of various pieces of data. The feed created with it can be very content-rich; some simple services can only extract title links. You can generate a feed without registration, but it's best to register for easier management of the generated feeds. There are also some disadvantages: in the free service, each webpage can extract a maximum of 20 entries, and the corresponding webpage will be checked every 6 hours. Additionally, under each piece of information in the feed, there will be Feed43's own link.