Is there a free site we can read the LN?

Probably no, as ln is the printed version. Though I'm not sure about the WN. But I heard the wn and ln ending is different

https://www.justlightnovels.com/2023/06/kumo-desu-ga-nani-ka/

16 volumes officially translated for anyone that wants to read. the website has a solid number of LNs too. all official translation