callas software GmbH
Status: Partner Member
Country: DE
Sector: No specific focus
Contact: Dietrich von Seggern
Joined at: Sep 06

Linked User
Dietrich von SeggernAfter receiving his degree as printing engineer, Dietrich von Seggeern is in 1991 starting his professional career in the area of processing of digital print data. He is involved in several research projects around data transmission in publishing using at that time new broadband networks. In this context he is also working on standardization of digital data formats and in 1997 he encounters for the first time the PDF format for these purposes. Since 2002 he is working for callas software in several leading professions. One of his main focusses is the international standard for PDF in digital archives: PDF/A. callas software was involved in the standardization process at ISO before the first part is published in 2005; further standard parts, PDF/A-2 and PDF/A-3 follow.
Heribert Schulzendorf
Marc Heusmann
Olaf DrümmerOlaf Drümmer is founder and managing director of callas software, a Berlin/Germany based company specializing in PDF analysis and processing, and of axaio software, developer of software extensions for Adobe Indesign and QuarkXPress. In addition he has been actively involved in the development of PDF standards within ISO since 1999.
Ulrich Frotscher

callas software launches groundbreaking pdfGoHTML

Berlin, November 19, 2012 – Today, callas software releases pdfGoHTML, a free Adobe Acrobat plug-in converting tagged PDF files into HTML supporting the ISO PDF/UA standard for universally accessible PDF documents and forms. One simple click on the plug-in button converts the tagged PDF into HTML that is opened in the default browser. In the resulting HTML different views can be selected to examine the tagging structure, have an easier reading experience or make the document more easily readable for people with visual disabilities or dyslexia.

callas software, known for its quality control and document archival software, worked closely with its sister company axaio software when focusing its attention on tagged PDF. Last year, axaio software released the beta version of its MadeToTag product, an Adobe InDesign plug-in to streamline tagging of Adobe InDesign files and create tagged PDF files. Tagged PDF files are essential for screen reader devices helping visually impaired people or reading software for people with learning disabilities such as dyslexia. In addition, tagged PDF files enable substantially better indexing by search engines and a more reliable text extraction or conversion to other formats.

It is this last property of tagged PDFs that is used by pdfGoHTML to allow high quality conversion of tagged PDFs into HTML. When opening a PDF file, pdfGoHTML immediately indicates whether or not the file is tagged and allows a one-button conversion into HTML in the default browser. Users can easily switch how the HTML is displayed to adjust it to their specific needs: browser default, structure tags, easy reader, inverted, low vision, and dyslexia.

For those who need to evaluate the tagging quality of a PDF file, the ‘structure tags’ view in the exported HTML provides a very quick, intuitive quality analysis tool that shows where the tagging structure of a tagged PDF needs improvement. callas pdfGoHTML will substantially speed up the creation and evaluation of tagged PDFs, and ensures a much higher degree of usability of tagged PDF files.


callas pdfGoHTML is immediately available as a free tool. It works in Acrobat 9, 10 and 11 on both Mac and Windows. It can be downloaded here ( and tried out with the attached tagged PDF files.

About callas software

callas software finds simple ways to handle complex PDF challenges. As a technology innovator, callas software develops and markets PDF technology for publishing, print production, document exchange and document archiving. callas software helps agencies, publishing companies and printers to meet the challenges they face by providing software to preflight, correct and repurpose PDF files for print production and electronic publishing. Businesses and government agencies all over the world rely on callas software’s future-proof, fully PDF/A compliant archiving products.

In addition, callas software technology is available as a programming library (SDK) for developers with a need for PDF optimization, validation and correction. Software vendors such as Adobe®, Quark®, Xerox® and many others have recognised the quality and flexibility provided by these callas tools and have incorporated them into their solutions.

callas software actively supports international standards and actively participates in ISO, CIP4, the European Color Initiative, the PDF Association, AIIM, BITKOM and the Ghent PDF Workgroup. In addition, callas software is a founding member of the PDF  Association, and since October 2010, Olaf Drümmer has served as its chairman.

callas software is based in Berlin, Germany. For more information, visit the callas software website at:
Press Contacts:

Four Pees
Carole Demeulemeester
Phone: +32 9 237 10 00

Related Products
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With pdfaPilot Desktop it is a snap to check whether your documents comply with the PDF/A standard. And if they don’t, callas pdfaPilot contains a wealth of tools to bring them in line. Working as an Acrobat plug-in or as a standalone application, pdfaPilot offers the broadest PDF/A support on the market. It works on single documents or in batch-mode on complete folders at a time.

callas pdfToolbox Desktop

callas pdfToolbox Desktop is the easiest yet most powerful PDF preflight and correction application on the market. You can fix PDF problems during preflight or with a click of the button in the Switchboard. Flatten transparency, convert fonts to outlines, convert office documents or even PostScript directly into PDF, compare versions of PDFs, visualize ink coverage… no task is too difficult for callas pdfToolbox Desktop.

callas pdfToolbox Server

callas pdfToolbox Server automates and standardizes the process of file delivery and reception. For print, publishing, advertising, packaging and design companies, it offers the most comprehensive solution for automated high quality preflighting and reliable automatic correction of PDF files. callas pdfToolbox Server will speed up job turn around times, and significantly reduce error rates.

callas pdfaPilot Server

For long-term archival and official submission of documents, PDF/A has become the standard. Your solution for PDF/A should rigorously follow the standard, provide quick and close integration capabilities, scale with your solution and be rock-solid. pdfaPilot Server scores on all points: it passed all industry-standard compliance tests, offers hot folder automation, multi-processor support and load-balancing where needed. And its technology is so solid it was licensed by Adobe for inclusion in Adobe Acrobat itself.

callas pdfToolbox SDK

callas pdfToolbox SDK offers a comprehensive interface and sample code for thorough integration of pdfToolbox technology into your own solution. It gives in-depth access for analysis and manipulation of the PDF and embedded formats such as fonts, metadata, color profiles, image compression and more. With C/C++ as its primary programming language it also offers APIs for other development and deployment environments - such as .NET or JAVA.

callas pdfToolbox CLI

callas pdfToolbox CLI offers fast and easy integration of pdfToolbox technology on a wide range of platforms through a command line interface. If you are looking for a productive way of adding PDF print preparation or repurposing to your web portal, internal production automation or document management system, callas pdfToolbox CLI features a vast range of well documented commands for preflight, fixing, document conversion, imposition and more.

callas pdfaPilot SDK

callas pdfaPilot SDK is the ideal solution for ECM companies or IT department with a in-house document management solution looking for in-depth integration of PDF/A compliancy.

callas pdfaPilot CLI

callas pdfaPilot CLI offers fast and easy integration of PDF/A technology on a wide range of platforms through a command line interface. It provides PDF/A compliancy verification, guaranteed conversion to PDF/A and direct conversion of office documents and emails including attachments. pdfaPilot CLI features load-balancing and fail-over for high-volume environments, supports virtual environments such as the Amazon cloud and provides out-of-the-box SharePoint integration.


pdfGoHTML substantially speeds up the creation and evaluation of tagged PDFs, and ensures a much higher degree of usability of tagged PDF files. One simple click on the plug-in button converts the tagged PDF into HTML making it easy to examine the tagging structure, have a more flexible reading experience or make the document accessible for people with visual disabilities or dyslexia.

callas pdfChip

pdfChip is a command-line application for the creation of high-quality PDF from HTML (taking full advantage of CSS and JavaScript). It supports all HTML features, but extends to support CMYK, spot color, XMP metadata, PDF standards, SVG, MathML, barcodes and more. Capable of generating single and multi-page PDF documents it is ideally suited for high-volume dynamic PDF generation.