Block access to a list of URLs

This policy prevents the user from loading web pages from blacklisted URLs. The blacklist provides a list of URL patterns that specify which URLs will be blacklisted.

A URL pattern has to be formatted according to

Exceptions can be defined in the URL whitelist policy. These policies are limited to 1000 entries; subsequent entries will be ignored.

Note that it is not recommended to block internal 'chrome://*' URLs since this may lead to unexpected errors.

From M73 you can block 'javascript://*' URLs. However, it affects only JavaScript typed in address bar (or, for example, bookmarklets). Note that in-page JavaScript URLs, as long as dynamically loaded data, are not subject to this policy. For example, if you block '', page '' will still be able to load '' via XMLHTTPRequest.

If this policy is not set no URL will be blacklisted in the browser.

Example value:

Supported on: At least Microsoft Windows 7 or Windows Server 2008 family

Block access to a list of URLs

Registry PathSoftware\Policies\Google\Chrome\URLBlacklist
Value Name{number}
Value TypeREG_SZ
Default Value


Administrative Templates (Computers)

Administrative Templates (Users)