NextDNS does not support the upload of custom blocklists, blacklist or whitelist for several reasons:

• Hosting a slightly different version of a well known blocklist for each user would not be scalable.
• We could not guarantee those custom blocklists are regularly updated and free of dangerous rules that could affect the stability of your browsing.
• Many blocklists are not well suited for DNS and need to be verified by our team.

If you know a public and well maintained list that may be interesting for other users, you can open an issue on our github repository.