Die Ratel DNS over HTTPS

Free filters:
  https://doh.dieratel.com/doh/adult-filter/   Adult Filter: Blocks adult, pornographic and explicit sites plus malicious domains, and enforces SafeSearch on Google, Bing and DuckDuckGo. Does not restrict YouTube or block proxies and VPNs.
  https://doh.dieratel.com/doh/family-filter/   Family Filter: Blocks adult content and malicious domains, blocks proxies and VPNs used to bypass filters, and enforces SafeSearch on Google, Bing, DuckDuckGo and YouTube.

Use with: curl --doh-url <url> https://example.com  or configure as a DoH server in your OS or browser.