Ever wonder how usable your site appears to someone with a disability, slower connection, or different setup? This list of tools highlights some of the most useful tools and extensions for making your website more usable.
Accessibility Tools
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Web Accessibility Checker
The accessibility checker evaluates your Web page and produces a report of all accessibility problems for your selected guideline. The checker identifies known problems, likely problems, and potential problems.
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Worldspace Accessibility Analysis
Worldspace is an accessibility analysis tool designed to identify errors with Section 508, and the Web Content Accessibility Guidelines. There is also a continuous monitoring solution available that delivers monthly reports.
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Lynx Viewer
This service allows web authors to see what their pages will look like (sort of) when viewed with Lynx, a text-mode web browser.
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Flicker Rate Test for GIF Images
People with photosensitive epilepsy can have seizures triggered by flickering or flashing. This test will check GIF images to ensure they meet accessibility standards against such cases.
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Browser Screen Resolution Checker
The browser screen resolution checker shows what your web page looks like with the viewer’s monitor set to different screen resolutions. Good for testing if your site functions well on the common resolutions that your viewer’s use.
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Search Engine Spider Simulator
Get an idea of how spiders see your web page.
Validators
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CSS Validation Service
Validate your CSS or CSS documents or HTML with CSS.
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Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
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Get Content Size
Retrieve page size, the size of a pages text content, and the percentage of size that makes up text content on the page.
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W3C Feed Validation Service
Check the syntax of Atom or RSS feeds.
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W3C Link Checker
Check your site to make sure all of your links are valid, and to ensure you’re avoiding common errors.
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Web Page Analyzer
Enter a URL to calculate page size, composition, and download time. The script calculates the size of individual elements and sums up each type of web page component.
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Website Speed Test
Test how fast your website loads to find out if it’s too slow for folks with poor connections. If so, it may be time to optimize the page/media, or move to a faster server.
Browser Extensions
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Web Developer (Very Comprehensive Browser Extension)
The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools. This extension is compatible with Firefox, Flock and Seamonkey.
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Firefox Accessibility Extension
The Mozilla/Firefox Accessibility Extension makes it easier for people with disabilities to view and navigate web content. Developers can use the extension to check their use of structural and styling markup that support functional web accessibility.
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Total Validator Firefox Extension
The Total Validator Firefox extension provides one-click validation. HTML, Accessiblity, etc.
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Accessibar Firefox Extension
Accessibar is a toolbar extension for Firefox which aims at providing various accessibility features for users who could benefit from them. These features primarily focus on the dynamic manipulation of the visual display of the web page in addition to the integration of a text to speech reader which can read out loud the browser’s user interface as well as web page content.
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HTML Validator Firefox Extension
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of an HTML page is seen in the form of an icon in the status bar when browsing. The details of the errors are seen when looking at the HTML source of the page.
Color Tools
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Colour Check
Checkpoint 2.2 of the WAI guidelines requires that color combinations created between foreground and background colors provide sufficient contrast when viewed by someone with color deficits or when viewed on a black and white screen. This color checker determines the color difference and contrast between any two colors.
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AccessColor (Another Color Contrast Tool)
AccessColor tests the color contrast and color brightness between the foreground and background of all elements in the DOM to make sure that the contrast is high enough for people with visual impairments.
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Color Blindness Simulator
Use the Color Blindness Simulator to reveal how your images may appear to users with a variety of color blindness conditions. Just upload a graphic to see the difference.
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Accessibility Color Wheel
Nifty tool that helps you choose color combinations that help make your page more accessible.
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Colorblind Web Page Filter
Apply any of the filters available here that simulates color blindness to an entire web page. Great for seeing exactly what your page may look like to those who are colorblind.
User Testing / Analytics / Management Tools
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Taskee Website Task Management
Assign, comment and manage tasks directly on your website. Great for finding out what needs to be improved upon during user testing.
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StomperScrutinizer Eye Tracking Simulator
The Scrutinizer is a web browser, based upon the Adobe AIR toolkit and the WebKit browser, that offers a simulation of the human visual system.
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Crazy Egg – Visualize Your Visitors (NO FREE TRIAL ANYMORE)
Fantastic, very easy to use set of tools to help research your users, and how they use your website. Features include heat maps, raw click data, and more.
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ClickHeat – Click Heatmap
A click heatmap that runs entirely on your server, completely free.
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Google Analytics
Completely Free Analytics and Tracking done by Google. That alone should speak for itself. Learn more about where your visitors come from and how they interact with your site.
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The Five Second Test
Caution: You may fall in love with this test after using it. The five second test is a simple usability test that helps you measure the effectiveness of your user interfaces. You’ve really just got to see this to understand why it’s so awesome.
What tools do you find yourself using when you’re developing websites?



