Download and install the latest version of Filestar.
Right click on one or more Cbz file(s) on your desktop and select Convert with Filestar.
Type convert to kepub in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.cbz -c "convert to kepub" (how).
Documents - File Explorer─☐✕
This PC › Documents
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Desktop
Downloads
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Pictures
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.cbzContract.cbz
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert CBZ to KEPUB
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine. It works on Windows, macOS only.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the CBZ files in my Downloads folder to KEPUB”
Or run it yourself:
filestarcli -i file.cbz -c "convert to kepub"
Runs on your computer, so your files stay on it. Works on Windows and macOS. 50 free conversions with the npm install, no account needed.
Can my AI agent convert CBZ to KEPUB?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.cbz -c "convert to kepub" on your computer, so your files stay on it.
It can be likened to a .cbr file but it uses .zip compression not .rar like in CBR file. It is a comic book zip file format with several images (in different or the same format) arranged in pages.
A KEPUB file is an EPUB ebook with extra Kobo markup (koboSpan elements and a kobo.js script) that Kobo e-readers use for their faster renderer, page statistics and highlighting. It is usually saved as .kepub.epub; any EPUB reader can open it.