B6I is a closed disc image format used by BlindWrite version 6. B6I files store exact copy of given disc along with all security settings. B6I image files are accompanied by small document files B6T that contain information about image file structure.

BlindWrite is a paid software with license priced at 20 USD. BlindWrite plunged in popularity as more users lost interest in using CD/DVD for storing data. Since 2013 the application is no longer developed.