Accessibility testing tools

To use the validators and tools on this page, you'll need a document type definition at the top of your code. If you're unfamiliar with "doctypes," see W3C doctype declarations.

Bobby

The Bobby validator will check HTML code for accessibility and offer tips on potential problem areas.

A-Prompt

This downloadable validation tool helps web page developers make their pages accessible.

Vischeck

Vischeck shows how web page images look to those who are color blind or have other disabilities.

Effective color contrast

This site offers tips for making effective color choices that work for nearly everyone.

PDF conversion to HTML

This Adobe form will convert an online PDF file on-the-fly to an HTML file. The quality and layout of the PDF file will affect how well this works.

Screen Reader Simulation

This site offers of a simulation of what it is like for a person with visual impairments to view a web page using a "screen reader."

Lynx view

This viewer shows how web pages display on the text-based Lynx.

You'll need doctype declarations in your source code to use most validators and tools.