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CBZ is the most widespread format for digital comics and manga: a plain ZIP archive whose entries are the individual pages as images, named in reading order. Practically every comic reader - on desktop, tablet or e-reader - opens it directly. If you have a set of scanned or drawn pages, CBZ is the simplest way to bundle them into a single, cleanly pageable volume. This tool takes your images and writes them into exactly such an archive.
The images are taken in the order you add them and given sequential, zero-padded names (page-001, page-002, ...). The padding ensures every reader sorts the pages correctly - even with three-digit page counts. The original images are carried over byte for byte, not re-compressed, so no quality is lost; because JPEG and PNG are already compressed, they are simply stored in the archive rather than packed again. The result is a single CBZ that opens in any common comic reader.
Everything runs entirely locally in your browser (fflate to pack, pure JavaScript - no upload, even offline). Mind the order when you drop the files, because it determines the page sequence in the finished archive. The page names are normalised; the actual image content and the format of each page are left untouched. If you would rather turn the same images into a PDF, use the images-to-PDF tool; for the reverse path from archive to PDF there is CBZ to PDF.
Limitations: Packs several images into one CBZ (ZIP archive) with sequential, zero-padded page names in drop order. The images are stored unchanged, not re-compressed; the format and quality of each page are preserved. The common page formats (JPEG, PNG and other raster images) are suitable. A CBZ has no text layer - so there is no formatting or table structure to carry over, each page stays a single raster image. Reading order follows the order in which you drop the files. With no image input the tool stops with a clear message.
FAQ
Are my images uploaded?
No. The packing happens entirely locally in the browser - even offline.
How is the page order determined?
By the order in which you drop the images; they are numbered sequentially (page-001, page-002, ...).
Does the CBZ lose image quality?
No. The images are stored unchanged, not re-compressed.
Can I open the CBZ again?
Yes. It is a standard ZIP; any comic reader opens it, and CBZ to PDF turns it into a PDF.