What Is The Difference Between Cbr And Cbz File Formats?

Question

As an avid reader of digital comics and manga, I'm trying to organize my library but keep encountering both .cbr and .cbz files. What's the practical difference for reading or archiving them?

Mir Fahad Talpur · Answer

CBR and CBZ are two different types of archived comics. RAR archive with the images is CBR, while the images archived with ZIP is CBZ. There is not much difference between the two as far as viewing the archives, but CBZ is more compatible with the average reader’s software because ZIP files are easier to work with than RAR files. Recently, while searching for some comics and web novels on a website, I stumbled upon The Hybrid pack – a science fiction action story. This story follows a diverse team of individuals who are a mix of alien and human with hybrid DNA. They are trying to survive in a corrupt colony that is run by large corporations. The files for this series are archived in CBZ format which makes it easy to read on my tablet.

Ophelia · Answer

So we have cbr and cbz formats. They’re pretty interesting actually once you get into the little details. Cbr and cbz serve roughly the same function: to create a compressed file of comic books that can be easily read by just about any device that can open up a file. Of course, as with most file formats, there are differences in the way that cbr and cbz files are compressed. Cbr files are compressed as RAR files, while cbz files are compressed as ZIP files. In practice, this can make quite a large difference in opening a file, and how you use specific software in order to open said file.

As someone who has explored reading both cbrs and cbz files, the support of different tools for reading these is quite different. Many fans find that RAR files make better reading material for people with big screens and high-res images because of how well the compression method handles such content. However, the majority of free and open-source readers support ZIP more, which is why CBZ files are generally preferred by comic fans.

As for my preferences, I’m rather used to the CBZ format since they’re way easier to manage, especially when I open them on my tablet. But, I think both of these formats are necessary for any comic book enthusiast. They can enjoy the beautiful artwork in One Piece or get engrossed in the story of Saga – whichever they prefer. I just wish more people would switch to the more accessible formats for their comics.

Brynn · Answer

These two comic book formats (cbr & cbz) are tried to be served to comic readers. Although both formats try to serve same purpose (reading comic books), they use different types of compression to achieve this goal. As a result of this, cbr files use RAR compression to retain high quality of images while CBZ files use ZIP compression. Hence, CBZ files are a lot easier to create and extract comic book files, especially on older systems.

As a casual comic reader, I don’t really see a difference between cbrs and cbzs. But as someone who reads a lot of digital comics, file size might be an issue for you. I recently downloaded a cbr and it took forever to open. I think it was just my comic book reader not being compatible enough. Both cbrs and cbzs are great for reading digital comics, though.

I’m actually a big fan of CBZ because it’s so easy to open up a zip file and start reading. Sometimes I don’t even need an app to open up my digital comics, which is really cool. As long as it works, I don’t really need anything more!

Xander · Answer

So, cbr and cbz files. Well, cbr files are RAR’ed up, and cbz files are ZIP’ed up. Therefore, cbrs are more efficient for larger images, so that is good for densely detailed panels, and the cbz would generally be easier to open and amend for a casual user.

For comic book fans, little differences between comic formats can greatly affect your experience. Both cbr and cbz formats have there own unique groups of followers. While reading comics on the go, it could make a big difference in time and storage space on your devices. Find what works best for you and get caught up in your favorite story!

Rabia Rasool · Answer

First, let me say I think of the difference between CBR and CBZ in terms of the difference between .mp3 and .flac audio files. In each case, one is a compressed (lossy), encoded file and the other is a lossless, encoded file. In the case of CBR and CBZ, however, both are lossless and we're talking about the different encodings of the archive's 'wrapper'.

Similar differences can be found in lossy audio like .mp3 and .aac. Both have their own methods of encoding audio and while there are some differences, for many people the biggest difference between them is indistinguishable. In the case of CBR and CBZ compression of the archive wrapper (the outer layer of the archive) both are using lossless compression, so images are stored unchanged. However, the ‘encoding’ of the wrapper itself is done differently, which in the end will mean little to the casual listener of images, as they will work in just about any player (app) and most people will only have access to .cbz or .cbr files anyway. The choice between them will likely be of interest to the audiophile type person, whether they be image archivists or collectors, as they will care about the technical details of the chosen method, how well it will work with certain hardware, and how it aligns with open standards and such like.

Idoreev · Answer

The terms archival and rar are largely academic in nature, as both are simple lossless containers for sequential files (such as images). The big difference between the two is in the tools used to create and decompress the archive: CBR ( Comic Book RAR ) uses the RAR algorithm, while CBZ ( Comic Book ZIP ) uses the DEFLATE algorithm which is the default for ZIP files. In the case of sequential page scans with minimal redundancy, the difference in terms of compression and therefore ultimate file size is negligible, but DEFLATE provides faster compression and decompression, especially for large amounts of data or when processing in batch mode on low powered systems.

The software ecosystem is set up to favor ZIP files much more than RAR ones. The native support of most OSes, the ease of use with scripting languages, and the huge number of libraries available for ZIP (unlike for RAR) make CBZ files the better choice to manage large collections of comics. This is especially true for server-side applications that serve comic book archives to users, such as Komga or Ubooquity. For such applications, the overhead of processing ZIP files is less than for RAR ones. For a curated, permanent, comic book library, CBZ files create less friction from the moment you start creating your digital collection to the long-term, and potential, migration to new systems to read your comics.

Mary Chynn Maina · Answer

From a pure specification point of view, the major differences are in the archive header data and in the used compression program. ZIP is documented in the open, RAR is proprietary but well-implemented by many programs. This openness is one of the reasons why CBZ is more future-proof than RAR.

So what does this mean for you? Chances are that in 20 years time some device, for whatever legal or other reason, will not be able to open RAR files. However your CBR files will likely need to be un-archived using some form of software conversion in order for you to read them. Your CBRZ files on the other hand will likely still be opened by your chosen reading application. As a matter of archive safety the recommendation of the digital preservation community is to use open well-documented formats for long-term storage of data, such as comics. For personal collections of culturally significant material such as your comics, this is not something that you need to worry about right now. But choosing to archive your comics in CBZ format is a small step in ensuring that you are able to read them in the future.

Asia · Answer

I didn't know this a while back when I started putting together a digital library of my comics. Essentially, CBR and CBZ files are the same thing. They're both comic book archive files that you can open with a comic book reader like CDisplayEx, or with a file unzipper like 7-Zip. The real difference between the two is how the images are compressed within the archive to make the file size smaller. CBR files are zipped with RAR, while CBZ files are zipped with ZIP. So the “C” in both file names stands for comic book, and the last letter in the file name tells you what type of archive the file is. For me, I ended up converting all of my comics to CBZ files because ZIP is supported natively on just about everything, and it doesn't require any codecs to open the files, which is a real plus when trying to read your comics on the web, or when moving between devices.

There are some comics readers out there who swear by the CBR format because the RAR compression inside of CBR archives can sometimes even up compress at a higher ratio than ZIP, to make a slightly smaller file for the same quality of images. But with the cost of storage these days so cheap, the tiny difference in file size size for CBR vs CBZ files is completely negligible for most people. ZIP support is virtually universal. Most readers can open CBZ files, but not CBR files. I've had to use plugins for a few older readers and even a few very minimal readers to get them to open CBR files.

Rever · Answer

Metadata. So something most comic readers as well as comic libraries are able to read from the comic archive file. The support for reading metadata from within the comic archive file (such as series name, issue number, writer etc) in CBR files and CBZ files varies. However, within ZIP files (as used for CBZ files) the inclusion of a very small file (such as 'ComicInfo.xml') containing metadata to a ZIP archive is a standardised practice that does not increase the size of the images within the archive.

There is usually decent support for reading metadata from both formats, although support for reading metadata from CBZ tends to be much more consistent between applications. So long as you're organizing a large library of comics using something like ComicTagger, working with CBZ files is likely to be far easier than their CBR counterparts. Furthermore, most tagging software can write metadata to a CBZ file cleanly. Metadata-heavy filename tracking, however, is often just as easily done with CBR files.

Ronieboy Good · Answer

As it stands, comics on the net have a plethora of formats all meanin’ roughly the same thing (a comic book archive) and each one can be made with a plethora of compression tools. There is in fact one for comic book, .cb, but it is not in common use. RAR was the format of choice for many sharing groups, offering a number of useful features that may not bear any relevance to the average comic reader (recovery records, for example, allowing you to recover partially damaged archives; and solid compression which offers the best ratio as all files in the archive are stored as a single data block).

In comics, simplicity can be a strength, and ZIP offers none of the features of RAR that made it such a hit in certain sharing ecosystems. For one, ZIP is far more open and thus far more compatible than CBRs. But more importantly, a CBZ is much faster to access on a page by page basis than a CBR, because a CBZ is simply a ZIP archive of comic book pages. Thus, rather than having to start at the front of the archive and decompressing everything until it reaches the page you want to read, you can start reading immediately. For serving comic book pages efficiently, CBZs are thus not only more compatible, they're also technically superior.

LEYDER ANDRES CABR · Answer

Your comic reader software is a universal adapter that makes reading comics possible. While in the past there were fewer readers, and each supported only one type of archive file, today virtually every piece of free comic reader software (and even the commercial stuff) includes a library to read both RAR and ZIP files. That problem has gone away.

For the end user, though, the question often isn't even worth asking. Software exists that reads CBR files just fine, and otherwise behaves exactly as one would expect a reader to behave. Any differences between the two formats are more historical than current, mostly a leftover from past collections and the need to support their reading back in the day. Metadata and library management of course differ between formats and between libraries and readers, but in terms of actually reading a comic, that a .cbr or .cbz file opens to view your comic is all that really matters.

What Is The Difference Between Cbr And Cbz File Formats?

11 Answers

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