Mobile device users do have a choice of PDF viewing apps, however, no fully accessible solutions are currently available to users who are blind with iOS’s VoiceOver and Android’s TalkBack screen readers. Mobile platform accessibility applications programming interfaces (APIs) are part of the equation and constantly being updated when the mobile platforms are updated. This situation is not a limitation of the PDF format but a choice that mobile platform manufacturers and PDF viewer developers make. The benefits of this tagged structure often are ignored by PDF viewing apps on mobile devices. The PDF specification has a well-documented tagging structure that can make a properly tagged PDF document accessible to people with disabilities including people who are blind or visually impaired.
Content authors must consider the accessibility of PDF on mobile platforms such as iOS and Android devices.
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