Information about Silktide’s free web-testing tool “Nibbler”. Articles to explain what Nibbler tests for, and development news.

New Nibbler badges – HTML5, Twitter & ARIA

New Nibbler badges

We’ve added loads of new badges recently, and you might have noticed the user leaderboards shuffling around as they’re claimed by users. Read more

New Nibbler updates – Scrolling layout & mobile screenshots

We’ve got a few new updates to announce on Nibbler, our free tool for testing websites. In this recent update we’ve added a new report layout, a Twitter test & mobile screenshots!

Nibbler scrolling layoutScrolling layout

Instead of having to click through each section from the menu, we’ve streamlined Nibbler’s report page so all you have to do now is scroll. It’s much simpler and easier to see the full report without missing out any important information.

Try this out for yourself by testing a website in Nibbler.

Mobile screenshots on Nibbler website reportMobile screenshots

We’ve improved the Mobile test, which lists all the sizes a website is optimized for. Nibbler now displays a screenshot of what the site looks like on a mobile and tablet, so you can see without even having to get your phone out of your pocket!

See also: Rare Nibbler badges you might not have seen 

New Nibbler Twitter test

Nibbler twitter test

Adding to our suite of social media tests in Nibbler, we’ve just launched a new one that’s so simple you probably know how it works already. Read more

Test your website in the dark!

Darkness test

Nibbler‘s new “Darkness” test

Today we’ve made a new test live on Nibbler that will allow you to test your websites in the dark.

It’s called the “Darkness” test and will test what your website looks like in the dark, or when the screen’s turned off. Studies show that many people view websites alone in the dark, and this new test will look for any special fluorescent CSS properties that the site uses. Glow in the dark CSS is part of the CSS4 specification, but you can use it right now with the -moz prefix.


It’s important that websites are visible under all lighting conditions. Reasons for darkness include:

  • Night time
  • Power cut
  • Eclipse
  • You’re in a cave
  • Incorrect use of curtains

The darkness badgeThe new Darkness test should not be confused with The Darkness badge, which is awarded to fansites of the British glam rock band “The Darkness” who achieved nationwide success in the early 2000’s.

Try it on your site

Try testing your site on Nibbler today, to see how you score on the darkness test, and don’t forget to Tweet about it!

New Google+ test, and social badges

We’ve added a new test to Nibbler today that checks for Google+ pages associated with your website. Whilst it’s not everyone’s social website of choice, Google+ is now the second most popular social network with over 343 million active users. Read more