about:blank is an app that blocks websites in Safari . I use it to break my bad browsing habits and to stay productive.

You specify the websites that you want to block on your mac or iOS device, which are then synchronized across all your other devices.

The rules are based on regular expressions, which allows for fine control over a blocked URL. For example you can block the landing page of YouTube and still watch individual videos.

Furthermore you can block websites on the fly inside of Safari .

What’s New

Version 1.1

Fixes start at launch option

Ratings and Reviews

3.1 out of 5
12 Ratings

12 Ratings

michael_wojcik ,

Great, simple way to block sites

This is a great little extension to help with staying focused!

I'm sorry to see other negative reviews, which seem to be moreso related to folks maybe not understanding how to use the extension. If anything, I'd recommend that the developer adds a short README somewhere with explicit examples of how people might construct URL patterns to block, specifically ones including Regex-specific patterns for those not familiar with that syntax.

Otherwise, a great extension!

Ckevlin ,

Simple and effective

After searching around for a way to block facebook, I almost gave up because I couldn’t find a simple safari extension to do so. All of them made you set a time limit or had more features than I needed. This app easily allowed me to do it without a bunch of bells and whistles. Highly recommend.

frustrated.loyal ,

Works Fine

Not sure about these reviews saying it doesn't work. Mine works fine. You've got to click the little a:b icon, which, on safari, is at the top of the page next to the address bar. Then you can just add the sites you want to block.


frederik dudzik
6.8 MB

macOS 10.12 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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