URL Rewriter

URL Rewriter edits URLs according to a custom regular expression when accessing a web page. It's based on the Host name rewriter extension by Mattias Lundberg.

URL Rewriter on the Chrome Web Store

View the source on GitHub

URL Rewriter edits certain URLs, whether typed in or linked, via a set of rules before navigating to the URL. A rule consists of a regular expression specified in capture groups, a capture group number to replace, and the replacement text for that group. When you click on a link or type a URL in the address bar, it is checked against each of the rules. If a matching rule is found, the text of the specified capturing group number is replaced with the specified text.

Example:

Regex: ^(http[s]?\:\/\/.*\.)(toothboiler)(\..*\/watch\?v=.*)$
Group number to replace: 2
Replacement text: youtube

If you click a link for http://www.toothboiler.com/watch?v=abcdefg, it matches the regex rule and capture group 2 ("toothboiler") is replaced with "youtube" to result in http://www.youtube.com/watch?v=abcdefg.