Callas Software GmbH, Berlin, founded in 1995, specializes in software for the analysis and processing of PDF files.

pdfColorConvert is the only tool you'll ever need to adjust color in PDFs. Convert RGB into printable CMYK, black graphics or text and grayscale images end up only on the black plate map spot colors or convert - completely or selectively - to CMYK


pdfCorrect Correct PDFs like an expert. No more customer complaints about unsatisfactory printing results due to bad PDFs. Analyses and corrects more than 60 different production problems in PDF files. Intuitive full text search helps to identify the best correction profile. Affordable and easy to use enabling every user to create production-friendly PDFs.


pdfLayerMaker The only tool for creating layers in PDFs not only delivers intuitive analysis reports. It is also possible to create layers for multi-language PDFs, discards or extracts die lines or fold marks, and a lot more.


pdfAutoOptimizer helps you to avoid incorrect print results caused by PDF transparencies. It downsamples transparencies automatically and ensures proper print output.


Command Line Interface (CLI) version PDF tools from callas software are also available as command line versions (CLI) - ideal for fully automated PDF analysis and processing as well as for smooth integration with existing workflows.