diffoscope will try to get to the bottom of what makes files or directories different. It will recursively unpack archives of many kinds and transform various binary formats into more human readable form to compare them. It can compare two tarballs, ISO images, or PDF just as easily. The differences can be shown in a text or HTML report. diffoscope is developed as part of the "reproducible builds" Debian project and was formerly known as "debbindiff".