Chromium, Safari, and Internet Explorer all support longdesc DOM reflection.
- Firefox has accessibility API support. As of Mozilla 25 FireFox has native support via the image context
Support for prior versions is supplied via:
- iCab - native support of longdesc via a
- Long Description Favelet - "This favelet announces the number of images with longdesc attributes and provides links to the long description file in each case." by James W. Thatcher. Works ubiquitously in Chrome, FireFox, Internet Explorer, Safari, Opera, and iCab.
- Long Descriptions in Context Menu - Official Chrome Extension by Dominic Mazzoni. "Right-click on anything with a "longdesc" or "aria-describedat" attribute to access its long description. Right-click on anything with a "longdesc" or "aria-describedat" attribute to access its long description. The HTML standard allows images to have a link to an additional file with a long description with the "longdesc" attribute. In addition there's a proposed new ARIA attribute "aria-describedat" that's similar. Normally these attributes are only exposed to users who have screen readers or other assistive technology installed that knows to look for these. This extension puts an item in the context menu so you can right-click on any element on the page and open its long description. It also gives you the option of adding a colored border to images with a long description so you know when one is available."
- Chrome Longdesc Plugin by Chris Kennish. It "highlights and
provides right-click access to image long descriptions, where
- Longdesc Chrome Extension by Dirk Ginader.
"Making the Longdesc content available to users without assistive technologies."
- Opera - native
support of longdesc Versions 10-12.15. Longdesc is exposed by a right click on
the image for which the longdesc has been defined.
Opera extension - Respects a web page's visual design yet provides critical
functionality. It will "Find things that have more description available, and
show them on demand. Where images (or something else) have a longdesc
attribute, the extension notifies by changing its icon and title, and enables
the user to see a list of the descriptions available, in its popup. When the
user selects an item in the popup, a new window opens with the description in
- Internet Explorer
- When used together with assistive technology such as Jaws, IE makes
longdesc accessible to the AT user.
- Configuring Internet Explorer to Handle Longdesc - Adds a context menu
entry to extract the longdesc attribute value and have the page navigate to its
content for sighted users. by Sean Hayes.
- Longdesc Linker for
Internet Explorer 6 - Browser Helper Object which adds a "Long Description"
item to the context menu that IE uses for images.
- Netscape 7.0 (rv:1.0.1 Gecko/20020823) supports the longdesc the context menu.
- Home Page Reader has native support of longdesc and is still used in Japan for
longdesc, even though it stopped being maintained years ago.
- SeaMonkey - discloses longdesc
URI via <right-click>/<properties>/Description
- Yandex browser + "Longdesc" extension.
The following assistive technology informs users that an image has a long
description, at which point the user has the option of reading the description or
The following authoring tools support the longdesc attribute.
- AChecker - developed by the Assistive
Technology Resource Centre, University of Toronto.
- AD Gallery
- Alt Text
- Connexions Markup Language
- Drupal 7 - Drupal 7 Release Date, January 5, 2011.
- easyALBUM - is screen reader friendly. The "slideshow" uses 3 attributes: alt, title and
longdesc. An example
album that uses
- elRTE editor - developed mostly by a Russian
- Galleria - One of the files of the
'gallery software' says, "Setting this to true will open any image
links in a new window. You can add image links using the longdesc attribute
(default) or customize it using data_config".
- gp|Easy CMS
- HiSoftware Compliance Sheriff
- iGraph-Lite - can
"generate rich descriptions alongside graphs through the longdesc tag", "Evaluating a tool for improving
accessibility to complex visual objects (PDF document) " Ferres, L., Lindgaard,
G.,Sumegi, L. 2010
- Juicy Studio's Image
- jQuery Accessible
- LongDesc Page
- Oxygen XML Editor
for ASP.NET AJAX
- Save As DAISY/MSWord Add-In
Studio and ASP.NET