Sign up ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Is there an offline HTML validator for Firefox 10+ working on Mac OS X?

share|improve this question does not work in your firefox? – akira Apr 3 '12 at 6:26
I need an extension, addon – dllhell Apr 3 '12 at 6:37
can't find that information in the question ... related question:… – akira Apr 3 '12 at 6:38
thank you, I dont know how I missed this question... – dllhell Apr 3 '12 at 6:53
so you need one which operates 'offline'? you should specify that in your question. – akira Apr 3 '12 at 8:38

2 Answers 2

Here is an option:

Not a Firefox extension itself but you can use it with the Firefox Web Developer Extension.

share|improve this answer

Does ist have to be a Firefox extension? Because Mac OS X includes W3Cs validator in already.

% pkgutil --file-info /usr/bin/tidy
volume: /
path: /usr/bin/tidy

install-time: 1312458669
uid: 0
gid: 0
mode: 755

Open a shell and type man tidy and you are good to go. Dave Raggett wrote a nice introduction for the tidy utility if you want to know more...

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.