A bookmarklet is a link that contains Javascript. Below they are styled as buttons. To install a bookmarklet, the most common way is to drag and drop a bookmarklet link into your browser's bookmarks or favorites bar.

There are alternative, browser-specific installation methods such as copying and pasting the link into your bookmarks or favorites.

  • Highlights all ARIA landmarks, including HTML5 tags that are interpreted as landmarks

  • Highlights all H1 through H6 elements on a page

  • Highlights every ordered list, unordered list, and definition list on a given page, along with how many list items exist for each list

  • Highlights the types of images on a page, along with their alt text

  • Highlights form-related elements and provides information on their associated labelling techniques, grouping labels and ARIA roles

illustration of bookmarklets installation

How to Use

Once installed, these bookmarklets can interact with any web page.

  • To activate, click a bookmarklet in your bookmarks or favorites bar
  • To de-activate, simply click it again or refresh your page
  • It will also de-activate when you resize your window or navigate to another page

You can run multiple bookmarklets on the same page at the same time. See the documentation for more about using each bookmarklet.

Supported Browsers

The drag-and-drop installation works on modern desktop browsers including:

  • Chrome, Firefox, Opera, and Internet Explorer 9+ on Windows 7, 8.x, and 10
  • Chrome, Firefox, Safari, and Opera on OS X
  • Bookmarklets are not currently supported on iOS and Android mobile devices