To host w3u lists you can use any web host server, just make sure the server offers the possibility of receiving a great number of requests.
There are also some free server services.
- Pastebin. This server is used to host text, which is ideal for w3u, in addition many players allow loading lists directly from the link that it is generated.
- w3ubin. This free server has been exclusively created for w3u files by the community and it is similar to Pastebin, but it includes a syntax error check, this means that if the list is not written in a correct w3u format, it will not allow you to save it.