Definition
PDF/UA, formally ISO 14289, is an International Organization for Standardization (ISO) standard for accessible PDF technology. A technical specification intended for developers implementing PDF writing and processing software, PDF/UA provides definitive terms and requirements for accessibility in PDF documents and applications. For those equipped with appropriate software, conformance with PDF/UA ensures accessibility for people with disabilities who use assistive technology such as screen readers, screen magnifiers, joysticks and other technologies to navigate and read electronic content.
How this term shows up in flipbook work
If you spend time publishing flipbooks, you will run into PDF/UA in one of three places: in the export settings of your design tool, in a compliance or accessibility audit, or in a conversation with an integrator. Knowing the term well enough to recognise it in those moments saves a meeting. The full Wikipedia article, linked below, goes much deeper into the history and the standards bodies behind it — we keep this glossary short on purpose so it stays useful as a quick reference.
Where to go next
- Browse the feature guides — many of them touch on this term in passing.
- Open the how-to library — step-by-step tutorials that put the vocabulary into practice.
- Read the tool reviews — we note which platforms handle this concept well and which leave it to you.
Source: “PDF/UA” on Wikipedia. Text reused under CC BY-SA 4.0. Snapshot fetched 22 May 2026.