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CBZ to PDF

docs/tools/cbz-to-pdf.md

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CBZ to PDF

Turn comic book archive files into PDFs. CBZ and CBR are the standard formats for digital comics -- they are just ZIP or RAR archives filled with images. This tool extracts each page, preserves the reading order, and produces a clean PDF where every image becomes a full-size page.

Supported Formats

FormatExtensionNotes
CBZ.cbzZIP-based comic archive (processed locally with pdf-lib)
CBR.cbrRAR-based comic archive (processed via PyMuPDF engine)

The CBZ converter recognizes JPEG, PNG, GIF, BMP, WebP, AVIF, TIFF, HEIC, and JXL images inside the archive. Non-standard formats are auto-converted to PNG before embedding.

How It Works

  1. Click the upload area or drag and drop your CBZ or CBR files. You can mix both formats in a single batch.
  2. Review the listed files. Remove any you don't need, or click Add More Files to add more.
  3. Click Convert to PDF. For CBZ files, the tool unzips the archive, sorts image files by name in natural order, detects each image's actual format, and embeds them into a PDF using pdf-lib. CBR files are routed through the PyMuPDF engine instead.
  4. A single file downloads as a PDF. Multiple files produce a ZIP archive named comic-converted.zip.

Options

No configuration is required. Each image becomes a page sized to match its original dimensions, so double-page spreads stay wide and single pages stay narrow.

Use Cases

  • Reading comics on a tablet or phone app that supports PDF but not CBZ/CBR
  • Printing specific pages from a digital comic
  • Archiving a comic collection into a format any file viewer can open
  • Sharing a comic with someone who does not have a dedicated comic reader

Tips

  • Images inside the archive are sorted using natural ordering (so page2.jpg comes before page10.jpg). Name your files with consistent numbering for correct page sequence.
  • The converter detects image formats by their binary signatures, not file extensions. A PNG accidentally named .jpg will still embed correctly.
  • CBZ files are processed entirely in the browser without loading the PyMuPDF engine, so they convert faster than CBR files.