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BFilter is a filtering Web proxy. It was originally intended for removing banner ads only, but since then its capabilities have been greatly extended.

Unlike most of the similar tools, it doesn't rely on blacklists (although it does support them). The problem with blacklists is that advertisers are always one step ahead. You see an ad slip through, you update your blacklist, and in case it didn't help, you add a new entry yourself. Once I got tired of that, I decided to write a proxy that would detect ads heuristically, much like modern anti-virus software manages to detect many viruses unknown to it.

What's New

Version 1.1.4:
  • Youtube works again.
  • Bypass mode now correctly disables the blocklist.
  • Fixed a crash on "disk full" condition.
  • The heuristic analizer was improved.
  • The JavaScript engine was updated.
  • Some new experimental filters where added.
  • Minor UI improvements.


Mac OS X 10.3.9 or later

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BFilter User Discussion

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pitupolchana Member IconComment+0

Cool Soft.. ever

Reply0 replies
Version 1.1.4
Planetary-Paul Member IconReview+11

I was getting significantly pissed-off by the Google ads on the MU site. While I was wondering how to block them in Saft and PithHelmet when I saw BFilter passing by. I installed it and *all* ads are now stripped. Some sites are mangled in the process, but not many. Most excellent stuff this.

Reply0 replies
Version 1.1.4
Lee123 Member IconReview+211

its the best. no more annoying animated gifs. life is great, thank you

Reply0 replies
Version 1.1.2
Mutz Member IconReview+8

I have this baby installed for a while now and it works flawlessly without screwing up the layout of your add-free webpages...
and it's free...
kudos to the developers

Reply0 replies
Version 1.1
kombi64 Member IconReview+0

Features: works right out of the box, kills ads and junk scripts with The Gread Heuristic Lightsaber, configures Mac's newtwork preferences automatically, doesn't need blacklist updating, and the ad-removal is configurable. Love it.

Reply0 replies
Version 1.0.9
kombi64 Member IconComment+0

Ad-blocking is sweet, but forwarding is obscure.

Aside from forwarding issues: the app seems like an optimal ad-filtering solution - heuristic analysis, my God!, someone had finally implemented in ad-blocking... and flash-filtering!

1) I have my TOR running, occasionally I use some HTTP proxies, and I decided to configure them both into one proxy-chain and see what happens then.

2) Here's my setup:

Browser -> bfilter HTTP proxy ( -> TOR SOCKS4 proxy ( -> some HTTP proxy -> Internet.

Now I point Firefox' HTTP proxy to, ads are filtered out, if it point it to 8118 (TOR), my identity is masked, but not both. :)

3) Here's my forwarding.xml (which doesn't work):

<?xml version="1.0" encoding="UTF-8"?>

<option name="foo" selected="selected">

<host>ip address goes here</host>
<port>port goes here</port>

4) I've searched web thoroughly, read all the available docs and forum discussions, but haven't figured out what am I doing wrong.

Hope it can be fixed.

Reply1 reply
Version 1.0.9
Joseph Artsimovich (Developer)

Sorry for the late response. It seems there is no way to get notifications when a comment is posted.

About your problem: the scenario you describe doesn't require messing with config files. Just create a network location for Tor, specify localhost:9050 as SOCKS proxy, and make sure it works. Then you just re-install BFilter and it will create a "(BF) Tor" location, which will work as you want:
Browser -> BFilter -> Tor -> Internet.

Editing the forwarding.xml file is only necessary if you want to have more than one chain between BFilter and the Internet.
Note that on OSX, an entry in forwarding.xml overrides a network location of the same name. But again, you don't need modifying forwarding.xml for your scenario to work.

AppleCrypt Mods Member IconReview+21
AppleCrypt Mods

works perfectly. EXCELLENT!!

Reply0 replies
Version 1.0.6
heavy_shower Member IconComment+7

quote: New option to remove ads completely, as opposed to subsituting them with a clickable replacement image.

How does one access the "option" to remove ads completely?

Reply1 reply
Version 1.0.6
Joseph Artsimovich (Developer)

Because the Mac version doesn't have a GUI, it's a little tricky. You have to edit the following file:
/Library/Application Support/BFilter/config
and add "page_cleanup = safe" (without quotes) somewhere after "ad_border = none". If you didn't have an earlier version installed, then you edit the option, not add it.
The possible values are "off", "safe" and "maximum".
They are documented here:

Finally, you have to restart BFilter. Either just reboot, or issue this command from the terminal:
sudo /Library/StartupItems/BFilter/BFilter restart

Mok.In.Touch™ Member IconReview+24

It's working perfectly. Great stuff.

Reply0 replies
Version 1.0.5
Mu5ti Member IconReview-1

Works as advertised.
If you want to tweak the rules, head to
/Library/Application Support/BFilter
after reading the forums and documentation.
The most beautiful part of this is the Network Locations are added by the installer, so if something is not working as it should, you can go back to your original Network Location.

Reply0 replies
Version 1.0.5
user icon+0
Version 1.1.4
user icon+10
Version 1.1.4
> 5 12


Current Version (1.x)


Downloads 11,395
Version Downloads 3,255
License Free
Date 07 Jun 2008
Platform OS X / PPC 32 / Intel 32
Price Free