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Privoxy

privoxy.org

Free plan Open source WindowsmacOSLinuxSelf-hosted
Visit privoxy.org
Spec score 8.7 #9 of 48 in Ad blockers

What it is

Privoxy is free, non-caching web proxy software for privacy controls, access rules, and changes to HTTP headers and web pages. It can modify page text, remove banners and web bugs, filter HTML annoyances, and inspect HTTPS requests and responses. A browser-based configuration and control utility includes rule tracing and remote toggling, and Privoxy can be chained with other proxies. It can serve multiple clients across a network or as a LAN gateway. The software runs on Windows, GNU/Linux, Mac OS X, Haiku, BSD variants, Solaris, and other Unix systems. It is licensed under the GNU GPL version 2 or later, with a free plan listed at free. A basic configuration is included with a new installation, but many advanced features need to be enabled. Privoxy handles HTTP and HTTPS proxying; it does not handle FTP, SMTP, instant messaging, IRC, or ICQ. It is not designed as a malware-removal tool, and the default setup does not filter malware. The project says it lacks trusted build infrastructure; individual project members or external contributors build and upload binary packages.

Spec sheet

What it does
Privoxy is a non-caching web proxy that filters traffic to improve privacy, modify web pages and HTTP headers, control access, and remove advertisements.Read 15 Oct 2026 · privoxy.org
Free plan
YesRead 21 Sep 2026 · privoxy.org
Support
Users can discuss issues on the Privoxy users mailing list, where developers also participate.Read 1 Oct 2026 · privoxy.org
License
Privoxy source code is released under the GNU General Public License version 2 or any later version.Read 15 Oct 2026 · privoxy.org
Ad blocking
Privoxy blocks advertisements and can remove banners and other page annoyances.Read 15 Oct 2026 · privoxy.org
API and extensibility
Privoxy exposes a browser-accessible CGI control interface and supports external filters, configurable actions, and client tags.Read 15 Oct 2026 · privoxy.org
Associated organization
The project identifies itself as associated with Software in the Public Interest.Read 15 Oct 2026 · privoxy.org
Browser control
Privoxy includes an integrated browser-based configuration and control utility with rule tracing and remote toggling.Read 1 Oct 2026 · privoxy.org
Browser control interface
An integrated browser interface at config.privoxy.org (also p.p) provides configuration, tracing, and remote toggling.Read 15 Oct 2026 · privoxy.org
Browser support
multiple-browsersRead 21 Sep 2026 · privoxy.org
Build security
The project says it has no trusted build infrastructure and that binary packages are built and uploaded by individual project members or external contributors.Read 1 Oct 2026 · privoxy.org
Build trust limitation
Privoxy states that it has no trusted build infrastructure and that binaries are uploaded by project members or external contributors.Read 15 Oct 2026 · privoxy.org
Click tracking
Privoxy can bypass many click-tracking scripts by avoiding script redirection.Read 15 Oct 2026 · privoxy.org
Configuration
A new installation includes a basic configuration, while many advanced features are disabled by default and require activation.Read 1 Oct 2026 · privoxy.org
Cookie management
The user manual lists cookie management as a core capability.Read 15 Oct 2026 · privoxy.org
Customization
The project says its configuration is flexible and can be tailored for individual users or multi-user networks.Read 15 Oct 2026 · privoxy.org
Developer contribution
Contributors are directed to the privoxy-devel mailing list, Git repository, GNU build tools, and SourceForge patch tracker.Read 15 Oct 2026 · privoxy.org
Device coverage
desktopRead 21 Sep 2026 · privoxy.org
Documentation depth
The project publishes user, FAQ, developer, installation, configuration, and man-page documentation.Read 15 Oct 2026 · privoxy.org
Filtering
Privoxy provides web-page filtering, text replacements, banner removal, web-bug removal, and HTML annoyance filtering.Read 1 Oct 2026 · privoxy.org
GIF de-animation
The software can de-animate GIF images.Read 15 Oct 2026 · privoxy.org
Header manipulation
Actions and filters can modify both client and server headers.Read 15 Oct 2026 · privoxy.org
Homebrew availability
Homebrew provides a privoxy formula installable with brew install privoxy and identifies its license as GPL-2.0-or-later.Read 15 Oct 2026 · formulae.brew.sh
Homebrew platforms
Homebrew lists binary packages for Apple Silicon and Intel macOS plus ARM64 and x86_64 Linux.Read 15 Oct 2026 · formulae.brew.sh
HTTPS inspection
Privoxy can inspect HTTPS traffic and filter HTTPS requests and responses.Read 15 Oct 2026 · privoxy.org
Independent editorial criticism
Wikipedia reports that PC World rated Privoxy 4/5 and characterized it as complicated but powerful.Read 15 Oct 2026 · en.wikipedia.org
Independent editorial praise
Wikipedia reports that Linux Format rated Privoxy 9/10 and described it as customizable, easy to set up, well documented, and enjoyable to use.Read 15 Oct 2026 · en.wikipedia.org
Intercepting proxy
It can operate as an intercepting proxy so browsers do not each need individual proxy settings.Read 15 Oct 2026 · privoxy.org
IPv6
IPv6 is supported when the operating system and configure script provide support for it.Read 15 Oct 2026 · privoxy.org
Limit: configuration complexity
A SourceForge reviewer says the custom PRCS configuration was confusing.Read 15 Oct 2026 · sourceforge.net
Limit: installation problems
SourceForge reviewers report failed installations after an OS X upgrade and difficulty finding support.Read 15 Oct 2026 · sourceforge.net
Limit: uninstalling
One SourceForge reviewer reported difficulty uninstalling the software and said it appeared to reinstall itself.Read 15 Oct 2026 · sourceforge.net
Malware scope
Privoxy is not designed to be a malware-removal tool and its default configuration does not attempt to filter malware.Read 1 Oct 2026 · privoxy.org
Network use
Privoxy can run as a server for multiple clients on a network or LAN gateway.Read 1 Oct 2026 · privoxy.org
Notable news: funding
A May 2, 2026 developer mailing-list message said the project was experiencing financial problems and planned additional donation options.Read 15 Oct 2026 · lists.privoxy.org
Per-site controls
Most features can be enabled or disabled for particular sites or locations.Read 15 Oct 2026 · privoxy.org
Praise: ease of installation
A SourceForge reviewer reports that the installation instructions were clear and the software worked immediately on OS X.Read 15 Oct 2026 · sourceforge.net
Praise: effectiveness
SourceForge reviewers repeatedly praise Privoxy as useful for blocking ads, cookies, and tracking content.Read 15 Oct 2026 · sourceforge.net
Project history
The first stable Privoxy 3.0 release occurred in August 2002 after development continued from Junkbuster.Read 15 Oct 2026 · privoxy.org
Protocol limit
Privoxy currently handles HTTP and HTTPS proxying but does not handle FTP, SMTP, IM, IRC, or ICQ.Read 1 Oct 2026 · privoxy.org
Proxy chaining
Privoxy can be chained with other proxy servers.Read 15 Oct 2026 · privoxy.org
Rating on SourceForge
4.8 out of 5 from 56 reviews.Read 15 Oct 2026 · sourceforge.net
Regular expressions
Configuration files support Perl Compatible Regular Expressions.Read 15 Oct 2026 · privoxy.org
Release
The official site identifies version 4.2.0 as the current stable release.Read 15 Oct 2026 · privoxy.org
Security configuration
Remote toggling and action editing are disabled by default because enabling them can create security issues.Read 15 Oct 2026 · privoxy.org
Security update
Version 4.2.0 addressed two reported potential security problems and added related memory-safety fixes.Read 15 Oct 2026 · privoxy.org
Source installation
Building from source requires autoconf, GNU make, and a C compiler such as GCC.Read 15 Oct 2026 · mail.privoxy.org
SourceForge interface types
SourceForge describes the interface as a non-interactive daemon, web-based interface, and Win32 application.Read 15 Oct 2026 · sourceforge.net
SourceForge operating systems
SourceForge lists BSD, HP-UX, Linux, Mac, server operating systems, Solaris, and Windows support.Read 15 Oct 2026 · sourceforge.net
Supported systems
Privoxy is known to run on Windows, GNU/Linux, Mac OS X, Haiku, BSD variants, Solaris, and other Unix flavors.Read 1 Oct 2026 · privoxy.org
Target users
Privoxy is aimed at people interested in security, privacy, or fine-grained control of their web and Internet experience.Read 1 Oct 2026 · privoxy.org

Plans and prices

Free Software Free GPLv2-or-later software · self-hosted proxy Read 15 Oct 2026 · privoxy.org
Privoxy free software Free free to use, copy, modify or distribute no warranty · no registration Read 1 Oct 2026 · privoxy.org

Every Privoxy plan and price →

Strong points and limits

Strong points

  • Free software licensed under GNU GPL version 2 or later.
  • Filters page content and supports HTTPS inspection.
  • Can serve multiple clients on a network or LAN gateway.
  • Includes browser-based configuration, rule tracing, and remote toggling.

Limits

  • Many advanced features are disabled by default.
  • Does not proxy FTP, SMTP, messaging, IRC, or ICQ.
  • Default configuration does not filter malware.
  • Project says it has no trusted build infrastructure.

Who it suits

Privoxy is aimed at people seeking privacy controls or fine-grained control of web traffic. It can also suit users who want a proxy for several clients on a network.

Verdict

Privoxy offers configurable web filtering and proxy controls across a range of systems, but advanced options require setup. Its protocol scope and build-package caveat are important considerations.

Where Specifiction places it

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