PDF/UA provides support for assistive technologies such as screen readers, magnifiers, joysticks and other technologies designed to navigate and read electronic content.

The Callas plug-in allows tagged PDFs to be converted into HTML. In the resultant HTML document, different views can be selected to examine the tagging structure, provide a better user experience or make the document more easily readable for people with visual abilities or dyslexia.

In developing pdfGoHTML, Callas worked closely with sister company Axaio Software, which last year released the beta version of MadeToTag, an InDesign plug-in to streamline the creation of tagged PDFs.

In addition to being essential for screen reader devices for the visually impaired or reading software for people with learning difficulties, tagged PDFs enable substantially better indexing by search engines and a more reliable text extraction or conversion to other formats.

When opening a PDF in Acrobat, pdfGoHTML indicates whether the PDF is tagged and allows a one-click conversion into HTML in the default browser. Users can then switch how that HTML is displayed, adjusting for: browser default, structure tags, easy reader, inverted, low vision, and dyslexia.

In addition, the 'structure tags' view in the exported HTML provides a quick, intuitive analysis tool that shows where the tagging structure of a tagged PDF needs improvement.

Callas pdfGoHTML is available immediately as a free tool and is compatible with Acrobat 9, 10 and 11 on both Mac and Windows PC. It can be downloaded from the Callas website and tried out with the attached tagged PDF files.

For a short video on how pdfGoHTML works, click here.