The Screen Curtain Bookmarklet

The Screen Curtain Bookmarklet allows engineers, testers, educators, and students to temporarily obscure web technologies while using screen readers in order to simulate the experience of using such technologies without sight.

This is analogous to the Screen Curtain mode provided on iPhone and iPad devices when using VoiceOver to experience the same. This bookmarklet should be used in combination with JAWS or NVDA on Windows when testing the non-sighted experience of typical screen reader users.

Additional resources:

Screen Curtain Bookmarklet

Instructions:

Right click the "Screen Curtain Bookmarklet" button, or alternatively set focus to the button and press Shift+F10, then choose Add to Favorites or Add to Bookmarks. The Screen Curtain Bookmarklet can then be run upon any webpage by choosing the bookmarklet from within your Favorites or Bookmarks menu.

Alternatively, the bookmarklet can be added manually within browsers such as Chrome and Safari, by activating New within the Bookmark Manager, then pasting the below code into the URL field.