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Avangate Acquires 2Checkout

50 Online Accessibility and Usability Tools

Usability and accessibility go hand in hand with conversion rates, customer satisfaction, targeted traffic and the list can go on. That's why we provide a list with 50 online tools to improve your web site usability and accessibility in order to reach the objectives mentioned earlier.

Please note that this is not a final list. If you know other great free online usability or accessibility tool not listed here, it'd be great if you could send us a notification with the URL.

Color Contrast Analyzer

Statistics show out that 1 to 20 people have some sort of vision color deficiency and for those it's hard to distinct and read image documents or web pages that do not respect the usability and accessibility standards. It is recommended and you are required by law that you test the documents on your website beforehand so that they can be addressed to almost all kinds of customers. Find out more about choosing the right colors for your web site.

Check the contrast of two colors using the W3C's color contrast algorithm by specifying the colors directly.

1. Color Contrast Analyzer Juicy Studio
2. Color Check Etre
3. AccessColor - Access Keys

Color Blindness Simulator

Many resources on the web are colored in such a way that it's difficult for users with sight deficiencies to comprehend them.
Some frequently diseases are:

  • Protanopia: The lack of the long-wavelength sensitive retinal cones that are required to distinguish between colors in the green-yellow-red section of the spectrum.
  • Dueteranopia: The lack of the medium-wavelength retinal cones that are required in order to distinguish between colors in the green-yellow-red section of the spectrum.
  • Tritanopia: The lack of the short-wavelength retinal cones that are required in order to distinguish between colors blue-yellow.

Try these online tools to check how people with disabilities see your web sites

4. Colour Blindness Simulator - Etre
5. Colorblind Web Page Filter - Color Filter
6. Color Blindness Check - Q 42
7. Vischeck
8. Accessibility Color Wheel - Giacomo Mazzocato

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Comments (2)

Olu Ogunbanjo says:
November 21st, 2008 at 5:01 pm

Just wondering what the best usability testing tool available for testing on behalf of a visually impaired user.

Claudiu Murariu says:
November 27th, 2008 at 5:55 pm

We also use Scrutinizer ( which is great not only to see how visually impaired people see your website but how difficult is to focus on certain elements.

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