AnyFormat

00 CBR → CBZ

CBR to CBZ

The same pages, in the container every reader supports.

Drop files or a folder here

or choose from your device · paste with ⌘V / Ctrl+V

.cbr .cbz .rar .zip

03Options 2

Used to decrypt the entries in this tab. It is never transmitted — which is exactly why you should not type an archive password into an upload-based converter.

Faster, and sensible when the contents are already compressed — photographs, video, or another archive. The ZIP will be about the size of its contents.

  • No upload The conversion runs in this tab. Your file never travels — not to us, and not to the advertising.
  • No sign-up, no email, no daily cap There is no account system to sign up to.
  • No size limit we invented Only your device's memory — about ~2 GB on a desktop browser, ~400 MB on a phone.
  • Turn your Wi-Fi off and convert anyway The conversion needs nothing but this page. Ads will not load without a connection; your file will still convert. That is the whole claim, and it takes five seconds to check.

A CBR is a RAR full of images; a CBZ is a ZIP full of the same images. This swaps the container and leaves every page exactly as it was — no re-encoding, no quality loss, no page renumbering.

Comic archives are just archives

There is no comic format. A CBZ is a ZIP, a CBR is a RAR, a CB7 is a 7z — each holding one image per page, read in filename order. The extension exists only to tell a reader application "these are comic pages".

That is why the conversion is lossless and fast: the pages are copied across without being opened. A converter that offers you a quality setting here is decoding and recompressing your artwork for no reason.

Why CBZ is the better container

Every comic reader supports CBZ. Rather fewer support CBR, because reading RAR requires an unrar library with licensing restrictions — which is exactly why several open-source and iOS readers omit it.

Converting once means the file works in whatever you read it on later, including devices you do not own yet.

Page order

Readers sort pages by filename, so the names are preserved exactly. Nothing is renumbered, renamed or reordered.

If the pages were misordered inside the CBR — usually because they were numbered 1, 2, 10 without leading zeros — they will be misordered in the CBZ too. That is a property of the source, and silently renaming files to fix it would be a worse surprise than leaving it alone.

What is kept and what is not

Every file comes out byte for byte identical. Nothing inside the archive is decoded, recompressed or touched — a JPEG stays the same JPEG, a database stays the same database.

The folder structure is kept, including nesting. Files are written back under the same paths they had inside.

What does not survive the change of container is everything Unix-specific: file permissions, ownership, and the executable bit. ZIP can store some of that and most Windows tools ignore it, so relying on it would be worse than saying plainly that it is gone. Symbolic links are skipped rather than turned into broken files, and you are told which ones.

Other names for this

Also searched as “cbr to cbz converter”, “comic book rar to zip”, “cb7 to cbz”.

Questions

Does the image quality change?
Not at all. The images are copied byte for byte from one container to the other and never decoded.
Is my archive uploaded?
No. It is opened and repacked inside this tab. An archive is usually the whole of something — a project, a case file, a set of photographs — so uploading one to a converter hands over all of it at once. Turn your Wi-Fi off before you start and this still works.
My CBR is really a ZIP. Does that work?
Yes. The format is detected from the file’s bytes rather than its name, and mislabelled comic archives are extremely common. You will get a note saying what it really was.
Can it open password-protected archives?
Yes — enter the password in the options. Encrypted entries are otherwise skipped and you are told how many. The password is used here and never sent anywhere, which is the whole argument for a local tool: uploading an encrypted archive together with its password to a stranger’s server defeats the encryption entirely.
Is there a size limit?
Your device’s memory, and a deliberate ceiling of 2 GB unpacked and 20,000 files. Those are not commercial limits — they are the point past which a browser tab stops being the right tool, and past which the file is more likely to be a decompression bomb than a real archive.