The DITA Open Toolkit is currently designed to automatically process a specific set of image formats. You can use images in any format with DITA, such as Visio files. However, using formats not supported by the Open Toolkit will generally require some custom development work.
The DITA Open Toolkit does not convert images between file formats. Therefore, if you use an image file format that a web browser cannot render, it will not appear in HTML output. If you require automatic file format conversion, It is possible to integrate image-conversion libraries such as Batik into the processing chain.
The DITA Open Toolkit supports the following image formats: