A word of caution on accessibility validators/checkers. They catch some mistakes, but they cannot replace human review. For instance, they can check if you are using headers in the wrong order, but cannot check if you missed tagging a heading as such. If you find yourself bolding 1-3 words at the top of a paragraph or list, it is probably a heading and needs the appropriate tag. Definitely use validators/checkers, but in addition to reviewing the content for accessibility.

Web page checkers

These validators or checkers help catch accessibility errors on your web pages.

• Cynthia Says
• Achecker
• WAVE Web Accessibility Tool - Get the browser extension!

Document Checkers

Unfortunately, there are no free document checkers. However, there are tools within Word, PowerPoint, and Acrobat for checking your documents for accessibility.

• Word and PowerPoint Accessibility Evaluation Checklist
• Create and verify PDF accessibility (Acrobat Pro)

Word Accessibility Checker

Word for Windows:

Check document accessibility in Word video

Word for Mac:

1. Select Tools > Check Accessibility.
2. Results will appear in a panel on the right with recommendations for corrections.

More step-by-step instructions at WebAIM: Word for Windows 2016 Using the Accessibility Checker

PowerPoint Accessibility Checker

PowerPoint Windows

1. Select File > Info.
2. Select Check for Issues dropdown.
3. Select Check Accessibility.

PowerPoint for Mac

1. Select the Review Tab.
2. Select Check accessibility.

Errors appear in a panel on the right. Open the error with the arrow on the left of the error. Clicking the object of the error will take you to the slide and highlight the issue. Information on correcting the issue will also appear in the panel.