Is Kindle Comic Converter Free? Yes — Here's the Catch-Free Answer
Kindle Comic Converter is completely free and open source. What that means, where to get it legitimately, and the free browser way to run the same engine.
Kindle Comic Converter (KCC) is completely free. It is an open-source project — the code is public at github.com/ciromattia/kcc — and the official downloads for Windows, macOS and Linux cost nothing. There is no trial period, no locked "pro" tier, no watermark on your converted files, and no page limit. The developers accept voluntary donations, but nothing in the software is paywalled (checked August 2026).
Short version
Yes, KCC is 100% free and open source — download it from the official GitHub at github.com/ciromattia/kcc. If a site asks you to pay for it, or for an "unlocked" version, that's not the real project. You can also run the same KCC engine free in your browser at mangaconverter.com, with nothing to install.
What "free" actually means here
KCC is free in both senses: it costs nothing, and its source code is open for anyone to inspect, modify and redistribute. That's not a promotional gimmick, it's the project's license and its history — KCC has been developed in the open by volunteers for over a decade, and the whole comic-and-manga community has been converting with it that entire time.
Concretely, the free official version gives you everything the tool does:
- Convert CBZ, CBR, CB7, PDF and image folders.
- Output EPUB (what Send to Kindle accepts today), MOBI/AZW3, KEPUB for Kobo, and CBZ.
- Device profiles for Kindle, Kobo and reMarkable models.
- Manga mode (right-to-left), spread handling, batch conversion.
There is no feature list hiding behind a purchase, because there is no purchase.
If someone is charging for it, walk away
Free open-source tools with recognizable names attract sites that re-host them behind paywalls, "premium download" buttons or bundled installers. Paying such a site gets you, at best, the identical free software — and at worst a modified build. The rule is simple: the official KCC download lives on the project's GitHub releases page and nowhere else. If money is being requested, you're not on the official project.
The same logic applies to online converters. A web service can honestly charge for server costs, but it should be upfront about what engine it runs. MangaConverter runs the open-source KCC engine and says so plainly — the free tier is genuinely free, and the engine is even self-hostable from kcc-cloud on GitHub.
Free, in your browser, nothing to install
If you'd rather skip the desktop install entirely, the browser route is also free:
- Upload up to 20 files, 1GB each, up to 1000 pages per file.
- Live preview: see the converted pages before you download anything.
- Outputs EPUB, KEPUB, MOBI or CBZ, sized for your exact device.
- Files are deleted automatically after 24 hours.
That covers the typical "one volume before bed" conversion without touching an installer. Heavy batch users may still prefer the desktop app — same engine, same price of zero.
Free tool, free formats
It's worth pairing free software with formats that stay free. KCC's EPUB output is an open standard every modern e-reader understands, and Amazon's Send to Kindle accepts EPUB directly (MOBI support was dropped in 2022, checked August 2026). For Kobo, the free KEPUB output keeps Kobo's reading stats and faster comic renderer working. See CBZ to EPUB for the most common trip, or CBZ to Kindle if you just want it on your Kindle with the least thinking.
Bottom line
- Desktop KCC: free, open source, official download at github.com/ciromattia/kcc.
- Browser KCC via MangaConverter: free, same engine, live preview, no install.
- Anything asking for payment to download "Kindle Comic Converter": not the project. Close the tab and use one of the two options above.
For what to actually do with the tool once you have it, start with the complete Kindle Comic Converter guide.