Privoxy

Privoxy operates as a non‑caching web proxy that intercepts HTTP traffic and applies a range of filters to improve user privacy. It can strip identifying information from requests, modify HTTP headers, and alter web page content before it reaches the client. The proxy also allows administrators to define access controls, blocking or permitting connections based on customizable rules.

In addition to privacy protection, Privoxy is designed to remove unwanted elements from web pages, such as advertisements and other intrusive content. Its flexible configuration files let users tailor the filtering behavior to individual preferences, making it suitable for both single‑machine setups and multi‑user network environments.

The software is released under the GNU GPL v2 (or later), is self‑hostable, and does not require a subscription or tiered pricing. It is maintained as free, open‑source software by the Privoxy developers and associated with Software in the Public Interest, with stable releases available for download and community‑signed binaries.