This article describes what XNB files are and how to open them to extract PNG files from them or save the audio in another format.
A file with the file extension XNB is a binary file of XNA Game Studio. It is used to store original game files in a proprietary format.
In Dutch: An XNB file is usually a compressed file full of images that appear in a video game created with XNA Game Studio. However, they can also contain additional game data, such as audio files.
Some software programs call these files compiled asset files.