Free · Private · In your browser
CBZ to PDF Converter
Turn comic archives into PDFs without uploading gigabytes of pages anywhere.
Files never uploaded Works offline Free, no signup No file size limits
How it works
- Drop your CBZ and pick a quality level – original, balanced, or small.
- Pages are laid out into a PDF at full page size, in reading order (manga right-to-left supported).
- Download a PDF that opens everywhere, from tablets to office printers.
Why “no upload” matters
Every conventional converter site works the same way: your file travels to their server, sits in their queue, gets converted on their hardware, and – you hope – gets deleted afterwards. You can’t verify any of it. The FBI has even warned about free converter sites that use that upload as a way to deliver malware or harvest the documents themselves. And with comics, uploading is not just a trust problem – at a gigabyte per volume it’s a bandwidth problem too.
ebook.tools removes the question entirely. The converter is delivered to your browser as code and runs on your machine; the file you drop is opened from memory, transformed, and saved back – the network isn’t involved at all. That isn’t a policy promise, it’s an architecture, and you can test it: load this page, switch off your wifi, and convert. It works exactly the same, because there was never anything to send.
Why comic conversion is exactly what shouldn’t happen on a server
A CBZ file has no secrets: it's a plain zip archive of page images, named in reading order. That simplicity is why it converts so cleanly – and why upload-based converter sites are such a miserable way to do it. Comics are big. A single collected volume scanned at good quality runs 300MB–1GB; uploading that on home broadband takes longer than reading the book, and half the upload sites reject it outright at their size cap.
Converting locally deletes the whole problem. The archive is unpacked in your browser, pages are sorted with numeric-aware ordering (so page-10 comes after page-9, not after page-1), and each image becomes a PDF page at its native dimensions – no letterboxing onto A4, no resampling you didn't ask for.
You choose what happens to image quality. Original embeds your pages byte-for-byte untouched, for archival fidelity. Balanced re-encodes at high quality for a much smaller file that still looks excellent on tablets. Small prioritises shareability – right for sending a chapter to a friend or reading on a phone. For manga, flip on right-to-left reading and the PDF is flagged so capable viewers present spreads in the correct direction.
Why PDF at all? Because CBZ support ends at dedicated comic readers, while PDF opens on literally everything: work laptops, library tablets, school Chromebooks, printers. A PDF copy is how a comic escapes the collector's shelf. Got CBR (RAR-compressed) files instead? Convert them to the open CBZ format first with our CBR to CBZ tool – same no-upload deal.