> For the complete documentation index, see [llms.txt](https://docs.usableprivacy.com/dns/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.usableprivacy.com/dns/readme.md).

# adfree DNS

We run a public privacy-protecting DNS server with advertising, tracker, and malware filtering. The Usable Privacy DNS (updns) service is accessible via the encrypted [DoH](https://en.wikipedia.org/wiki/DNS_over_HTTPS) and [DoT](https://en.wikipedia.org/wiki/DNS_over_TLS) protocols. We use the unified hosts from [StevenBlack](https://github.com/StevenBlack) to filter unwanted domains.

## How to use the Usable Privacy DNS Services

{% content-ref url="/pages/-M4Sw1mY56JUHTgkjL4Y" %}
[Setup adfree DoH Service](/dns/updns-services/dns-over-https-doh.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M4T2YHYuc0FeV7Q2jsk" %}
[updns DoT Service](/dns/updns-services/dot-dns-over-tls.md)
{% endcontent-ref %}

## Privacy Policy

1. We do not log client IPs, requested domains or any other personally-identifiable information.
2. We aggregate information on filtered domains and geolocation for user protection.

## Open Source

The [**updns**](https://github.com/usableprivacy/updns) software stack is available under the **BSD 2-Clause License** on GitHub.

### [github.com/usableprivacy](https://github.com/usableprivacy/updns)