Convert CBR to CBZ.
RAR comics repacked as CBZ locally — pages bit-identical.
Drop CBR comics here
or browse your files
Paste with ⌘V · or drop files anywhere on the page
Files never leave your device. Everything runs in your browser, nothing touches a server — tools you've used even work offline.
Convert CBR comics to CBZ entirely in your browser — the RAR container becomes a ZIP; every page rides across bit-identical by default. CBZ opens in more readers, and unlike RAR it is a format tools can also write. Nothing is uploaded.
How it works
- Drop files anywhere on the page, click to browse, or paste with ⌘V.
- Pick a quality or preset — or set an exact target size and let the tool find it.
- Compress, compare before/after, and download — individually or as a ZIP.
Why CBZ over CBR
CBR is a RAR archive, and RAR is a proprietary format most software can read but almost none may write — which is why comic tools, readers and libraries have standardized on CBZ (ZIP) instead. This converter reads the RAR locally, keeps every page and the metadata exactly as they are, and writes a clean CBZ with the same filenames and order.
Bit-exact by default, smaller on request
The page arrives with quality preset to 100: every page is carried over bit-identical, so the conversion is purely structural. Lower the quality slider and the same run also re-encodes the pages — the Compress CBZ machinery working during the conversion. Password-protected CBRs are not supported; extract them first with Extract RAR.
Frequently asked questions
Are the pages altered?
Not by default — at the preset quality 100 every page is byte-identical to the original. Only the container around them changes from RAR to ZIP.
Why is my CBZ bigger than the CBR was?
RAR sometimes compresses a hair tighter than ZIP. The difference is small (pages are already-compressed images), and the trade is compatibility — CBZ opens everywhere. Lower the quality slider if size matters more.
Do reading order and metadata survive?
Yes — filenames, folder structure and ComicInfo.xml all carry over unchanged, so readers show the exact same book.
Is it private?
Yes. Archives are built and converted entirely in your browser — neither the archive nor the files inside it are ever uploaded, and any password you set is applied locally. The server does nothing but deliver this page. Want proof? Run one file through, switch your connection off, and run another — it still works.