I was looking for free porn blockers but didn't find instructions. Hope this help someone. Someone said you can block porn at DNS level but I did not see instructions. Chatgpt says:

If you mean a free blocker for adult/porn websites, you can set one up without paying for software.

Easiest option: DNS filtering

A DNS service can block adult websites across your computer and many apps.

Cloudflare Family DNS

• Preferred DNS: 1.1.1.3
• Alternate DNS: 1.0.0.3

On Windows 11:

1. Settings → Network & internet
2. Select Wi-Fi or Ethernet
3. Select your connected network → Hardware properties
4. Find DNS server assignment → Edit
5. Choose Manual
6. Turn on IPv4
7. Enter 1.1.1.3 and 1.0.0.3
8. Save and restart your browser.

This blocks domains classified by Cloudflare as malware or adult content.

Browser-only option

You can also install a free content-blocking extension such as uBlock Origin and use filtering lists, but DNS filtering is generally harder to accidentally bypass because it operates below the browser level.