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PDF image with blank (single space) alt text Screen reader compatibility

Last updated: January 11, 2020

Expected Result: causes problems in some screen readers

Actual Result: causes problems in 16 screen reader / browser combinations

For expected failures, the results show which AT combos the failures affect. Results are recorded from the user's viewpoint, so describe the user impact of authoring errors.

Code used for this test:


        <a href='SR_PDF_blank_alt_text.pdf'>SR_PDF_blank_alt_text.pdf</a>
    

Change History

Last updated: January 11, 2020

Screen readerBrowserModeNotesWhat the user hears
Fail NVDA 2019.2Chrome 79 ReadingNo description for graphic Graphic, unlabeled graphic.
Fail NVDA 2019.2FF68 ReadingImage ignored - Firefox accessibility inspector shows no images in accessibility tree
Fail NVDA 2019.2IE11 ReadingNo description for graphic Graphic
Fail NVDA 2018.4Chrome 73 ReadingNo description for graphic Graphic, unlabeled graphic.
Fail NVDA 2018.4FF60 ReadingImage ignored - Firefox accessibility inspector shows no images in accessibility tree
Fail NVDA 2018.4IE11 ReadingNo description for graphic Graphic
Fail NVDA 2017.3IE11 ReadingNo description for graphic Graphic
Fail JAWS 2019.1912.1Chrome 79 ReadingNo description for graphic Unlabeled graphic, graphic.
Fail JAWS 2019.1912.1FF68 ReadingImage ignored - Firefox accessibility inspector shows no images in accessibility tree
Fail JAWS 2019.1912.1IE11 ReadingImage ignored
Fail JAWS 2018.1811.2Chrome 73 ReadingNo description for graphic Unlabeled graphic.
Fail JAWS 2018.1811.2FF60 ReadingImage ignored - Firefox accessibility inspector shows no images in accessibility tree
Fail JAWS 2018.1811.2IE11 ReadingImage ignored
Fail JAWS 17.0.2007IE11 ReadingImage ignored
Fail VoiceOver macOS 10.14Safari 13.0 ReadingNo description of image Space, image
Fail VoiceOver iOS 12.4Safari iOS 12.4TouchNo description of image Image

Test notes

All tests were carried out with screen reader factory settings. JAWS in particular has a wide variety of settings controlling exactly what gets spoken.

Screen readers allow users to interact in different modes, and can produce very different results in each mode. The modes used in these tests are:

In the «What the user hears» column: