(jpeg quality is not recorded in a file but can estimated by examining the luminance quantizer matrix. When I load a real webp image it doesn’t give a warning and reports it as webp format without an estimate of the quality level. The information page reports it as using jpeg compression with an estimate of the quality level. Proof follows.Īll of the converted “webp” images when opened in irfan give me a ‘this is a jpeg with wrong file extension’ warning. See that extension? It’s saying they are in webp format but they aren’t. All of them are given a name like “page1.webp”. I have converted several hundred images using it. It is easy enough to use and can batch process lists of comic books in one go.Ĭbxconverter is a fraud.

Closing WordsĬbx Converter can be a handy tool if you want to reduce the size of digital comic books and use a reader that supports wepb images. The program could use a couple of usability enhancements, like previews of the resulting image quality or information on the conversion process itself to see how much storage you saved by the conversion. You should make sure however that your comic book reader supports the cbz format. There is also an option to change the default parameters of the conversion process in the preferences, for instance to change the desired quality level. This can reduce the size of the image even further. This is done with a right-click on a book and the selection of the resize option. Options are provided to resize comic book images as well. That's without doubt a great reduction especially since it does not seem to impact the quality of the resulting images too much. You can hit the start conversion button right away to convert the images in each comic book to webp or select to resize the images of some or all files as well to reduce the space even more.Ī quick test run with six comic books sized between 15 to 18 Megabyte reduced the size of each to about 6 Megabyte. Either drag and drop them into the interface or use the File > Add source menu to do so.Įach comic is listed with its name, size, number of images, the width of the images and its average size to Kilobyte ratio automatically.

You can add one or multiple comic book files into the program interface after start. The program has been designed to convert any support comic book format into one that uses webp images instead of the image type used originally.

While that may not be a problem on the desktop computer, it may very well be one if you want to read comic books on your smartphone or tablet.Ĭbx converter is a free program for Windows that provides a solution for some users. That's also one of the main reason why the size may differ a lot. The images that are included in a comic book archive may have different resolutions and quality levels usually ranging from a width of 1024 to 1920. That's why it is possible to open these files in compression software like 7-Zip to access individual images or extract them all.

Convert cbr to cbz