Last Updated: 29 July, 2026
TL;DR – CBZ is a ZIP‑based comic container that’s universally supported, free, and fast. CBR is a RAR‑based container that squeezes a few extra megabytes out of each issue at the cost of a proprietary codec and slightly slower extraction. For most readers and creators, CBZ is the safe, future‑proof choice; pick CBR only when you need every last byte saved and you already have a RAR decoder on every target device.