Start with the archive’s page names
A CBZ is a ZIP archive containing page images. This tool supports still PNG and RGB or grayscale JPEG pages and orders their full paths naturally: page1, page2, page10 rather than page1, page10, page2. ZIP entry order is not treated as reading order, because archive programs can store the same files in different sequences.
Choose your file and leave the page field empty for all pages. If the natural order is unsuitable, enter the intended source-page numbers explicitly. For example, 3,1-2 produces the third image first, followed by images one and two. A source page can appear only once; overlapping ranges are refused.
Verify with the real example
The built-in example is a real three-image CBZ generated locally. Its filenames are page1.png, page2.png and page10.png. The middle image is a 481-pixel-wide landscape spread, so splitting it produces a 240-pixel left half and a 241-pixel right half without losing a column of artwork. The complete split example has four output pages.
Read the output page map and move through the prepared-image preview. Check the cover, the first spread and the final page before downloading. The PDF and rebuilt CBZ use the same chosen order. Sequential output filenames make that order explicit when the new archive is reopened.
Choose a PDF page size consciously
Image-sized PDF pages use your selected DPI to translate pixels into points; 150 pixels become 72 points at 150 DPI. This changes the document’s physical page size without inventing detail. A4 and US Letter options instead fit each page image inside a fixed portrait sheet with margins.
The PDF contains images rather than searchable text. There is no OCR, panel detection or missing-page recovery. Keep the original archive, then open the PDF in your intended reader to verify page fitting and legibility at the size you actually use.