Turn a CB7 comic archive (7z-based) into a PDF locally - one page per image, correctly sorted, with no upload at all.
Running locally on your device ...
Running locally on your device ...
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No re-upload neededThese tools accept .PDF - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
CB7 uses the 7z compression format as its container - the same idea as CBZ (ZIP) or CBR (RAR), just with a packer that often produces smaller files for comic pages. Some scan groups deliberately choose CB7 when an archive would otherwise be huge. The catch: almost no comic reader, cloud service, or browser opens 7z natively, while PDF works everywhere. This tool unpacks your CB7 and builds a PDF where every page sits on its own.
Unpacking runs through a real, in-browser 7z read engine (libarchive). Sorting matters here: 7z often stores entries alphabetically rather than numerically when packing, so Seite_10.jpg would sort ahead of Seite_2.jpg, for instance. This tool detects that and reorders the pages numerically by filename before they go into the PDF - without this correction, the reading order in the result would be scrambled.
The conversion happens entirely locally in the browser, with no upload and usable offline too. PNG and JPEG pages are embedded full-bleed at their original resolution; companion files like ComicInfo.xml do not carry into the PDF, since a PDF has no field for them. A password-protected or damaged CB7 is rejected with a clear error message. If a switch to a more widely-supported archive format suits you better than a PDF, CB7 to CBZ does exactly that; for RAR-based comics there are dedicated CBR to PDF and CBR to CBZ tools.
| Input formats | CB7 |
|---|---|
| Output format | |
| Batch processing | Yes |
| Processing | Locally in your browser (WebAssembly) |
| File upload | None |
Limitations: Fully unpacks a CB7 (7z archive) and produces a PDF from it: one image per PDF page, full-bleed at original resolution, corrected into numeric filename order - even when 7z stores the entries internally in alphabetical order. PNG and JPEG pages are embedded; other formats and metadata files like ComicInfo.xml are not carried over. A password-protected or genuinely damaged archive, or one with no image page at all, is rejected with a clear error message.
No. The entire unpacking and PDF build run locally in the browser, without upload - the tool works offline too.
7z often sorts entries alphabetically rather than numerically when packing, so page 10 can end up before page 2. This tool detects that and renumbers the pages before embedding.
Yes. The original images are embedded into the PDF unchanged, without recompression.
It gets rejected with a clear error message instead of being processed incorrectly.
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