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CBR is a file format used for digital comic books, essentially a RAR archive containing image files (usually JPEG or PNG) displayed in sequence. CBR files can be opened with comic book readers and are popular for distributing scanned comics.
RB is an old eBook format used by the Rocket eBook reader, one of the first dedicated eReaders. It includes text and formatting information but has fallen out of use and is now mainly encountered in digital archives or legacy collections.
Convert your .cbr files to .rb right in your browser — no downloads, no installs. Everything happens securely in the cloud.
We never store your files permanently. Only you can access them, and they’re automatically deleted from our servers within 2 hours.
Turn your CBR files into RB in just a couple of clicks. No registration, no limits — and it’s 100% free.