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PDF1 Image with alt text Screen reader compatibility

Last updated: January 11, 2020

Expected Result: works in a screen reader

Actual Result: causes problems in 8 screen reader / browser combinations

WCAG Technique: PDF1 Applying text alternatives to images with the Alt entry in PDF documents

Code used for this test:


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

Reliability Trend

This graph shows reliability over time for this code in NVDA, JAWS and Voiceover. Other screen readers don't have enough historical data yet to plot trends.

100%80%60%40%20%0%201520162017201833%201950%

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
OK NVDA 2019.2IE11 Reading Graphic, this is alt text
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
OK NVDA 2018.4IE11 Reading Graphic, this is alt text
OK NVDA 2017.3IE11 Reading Graphic, this is alt text
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
OK JAWS 2019.1912.1IE11 Reading This is alt text, graphic
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
OK JAWS 2018.1811.2IE11 Reading Graphic, this is alt text
OK JAWS 17.0.2007IE11 Reading Graphic, this is alt text
OK VoiceOver macOS 10.14Safari 13.0 Reading This is alt text, image
OK VoiceOver iOS 12.4Safari iOS 12.4Touch This is alt text, 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: