GlimmerBlocker Logo


HTTP based ad blocker for Mac OS X

No hacks, no instability
Upgrade Safari whenever you like, no need to wait for an upgraded hack

GlimmerBlocker is no longer maintained and should no longer be used as web sites have migrated from using plain http to using https (i.e. encrypted) which prohibits modification by a proxy unless you resort to install custom SSL certiticates on the client.

You should use a browser extension instead.

It was made as a hobby project during 2007-2008 by Peter Speck. It features both a custom http server and http client and a Mac OS X control panel.

GlimmerBlocker did not only block requests but also allowed for adding custom css and javascript to the pages. It also allowed for modification of the page html before the browser receives the html, which made some modifications much easier than DOM based modifications.

OS X 10.8 Gatekeeper support

OBS: Only compatible with OSX 10.7 and 10.8
Macs using OS X 10.5 or 10.6 must use Glimmerblocker 1.4.16

This version should work with Gatekeeper set to "Mac App Store and identified developers" in addition to "Anywhere".

Other improvements:

Supports Safari keywords in Safari 6 (requires using Google as search engine).

Added "is it down for everyone?" link to error page. Suggested by rrossj.


Added separate json type. By request from Alessandro Vendruscolo.

Match application/json in "any text" type.

Better <title> for error pages. By suggestion from 'rr'.

Allow (invalid) CONNECT strings which include a path, e.g. CONNECT HTTP/1.0

Added gb.curl(method, url, headers) for transform scripts

Add '%t' to keyword expansion which uses latin-1 encoding of the url argument as some sites uses latin-1 instead of utf-8. By report from Andreas Maks.

Add support for using only IPv4 (suppressing all IPv6) by creating the file /Library/GlimmerBlocker/preferIPv4Stack.txt

Much improved stringify using Angus Croll's toType() idea.

Release date

Version 1.5 was released 2012-07-24

list of all release notes.