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AChecker is an open source Web accessibility evaluation tool. It can be used to review the accessibility of Web pages based on a variety international accessibility guidelines. Use the Public AChecker to evaluate the accessibility of a Web site you know.
Features of AChecker:
- Accessibility Checking: Set the standard against which to evaluate your Web page, then generate a report of Known, Likely, and Potential accessibility problems.
- Markup Validation: Turn on Markup Validation, to validate your HTML while reviewing accessibility.
- Display Source Code: Turn on source code for quick review of the HTML surrounding places where accessibility problems are identified.
- AChecker Handbook: Throughout AChecker, open the handbook for a description of how things work.
How to Use AChecker:
- Enter a URL to a Web page, or upload an HTML file.
- Review Known Problems and make the suggested corrections to the Web page, then run AChecker again. Known Problems are those that AChecker knows with certainty are accessibility barriers.
- Review Likely Problems. Likely Problems are those that AChecker has identified as probably barriers, but can not be sure. They require a human to make a decision. Login, then answer the questions to confirm if likely problems are actual problems, and make corrections to the Web Page where likely problems are confirmed. Save your decisions after all Likely Problems are resolved.
- Review all Potential Problems. Potential Problems are those that AChecker can not identify, that require a human to make a decision. Answer the questions to confirm if potential problems are actual problems, and make corrections to the Web page where potential problems are confirmed. Save your decisions after all Potential problems are resolved. When all Known, Likely, and Potential problems have been resolved, a Conformance Seal is issued.
- Paste Conformance Seal into Reviewed Web Page. Copy the HTML generated after completing an accessibility review into the HTML of the reviewed page. Run AChecker again on the Web page, which will recognize the addition of the seal as a change, and resolve the new Likely and Potential problems. You may copy the conformance seal to a local folder, and adjust the path to the image in the copied HTML.
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