MangaSendr and KCC: when to use each
Use KCC if you want control over every page, read on a Kobo or a reMarkable, or have RAR-based CBR files. It's free and open source. Use MangaSendr if you'd rather send files from any browser, phone included, and have them arrive on your Kindle sized for its screen, split if needed and in order.
We make MangaSendr, so keep that in mind as you read. KCC is a free project by other people, and what we say about it comes from its README and source code, linked at the bottom of this page.
Three things KCC users ask first
- Where your file goes
- It's uploaded to our server, converted there and emailed to your Kindle's Send to Kindle address. We delete it within 24 hours of sending, or after an hour if you never send it. Your history keeps the title, page count and a small cover.
- What reaches your Kindle
- A fixed-layout EPUB, one page per screen, sized for the Kindle model you pick. Amazon converts it for your Kindle, as it does any EPUB sent this way. You can page through real ones on the Paperwhite page.
- CBR files
- Most CBR files are RAR archives, and MangaSendr can't open those. Extract the pages and zip them again as a CBZ, or use KCC for them. A CBR that is a ZIP inside works as it is.
The short answer
KCC (Kindle Comic Converter) is a free desktop converter for Windows, macOS and Linux, developed since 2012. It's still active: version 12.0.0 came out on September 26, 2026, and it has profiles for the Kindle Colorsoft, Scribe 3 and Scribe Colorsoft. It has settings for cropping, double-page spreads, upscaling, webtoons and much more.
MangaSendr does a narrower job. It converts a manga or comic file you own for the Kindle you picked and emails it to that Kindle through Amazon's Send to Kindle. There are only a few settings. The real difference is what happens after the conversion. With KCC you move the file onto the Kindle yourself. With MangaSendr it shows up in your Kindle library.
KCC and MangaSendr side by side
| KCC | MangaSendr | |
|---|---|---|
| Cost | Free | Your first volume is free, then $29 paid once or $4.99 a month |
| Install | Desktop app for Windows, macOS and Linux | Nothing to install. It runs in any browser, phone included. Optional app for Mac and Windows. |
| Files it reads | Image folders, CBZ, ZIP, CBR, RAR, CB7, 7Z, EPUB and PDF. Some archives need 7-Zip installed. | CBZ, ZIP, image-based EPUB, PDF, JPG, PNG and WebP. CBR only when it's a ZIP inside. |
| Files it makes | MOBI/AZW3, EPUB, KEPUB, CBZ, PDF, an EPUB for Send to Kindle, or a folder of images | A fixed-layout EPUB for your Kindle. EPUB or CBZ downloads for other e-readers. |
| Sends to your Kindle | No. Its README recommends copying the file to the Kindle over USB. You can also upload it on Amazon's Send to Kindle website yourself. | Yes, by Send to Kindle email, after you approve our address in your Amazon settings once |
| Big volumes | Can split its output by size. Its "EPUB (200MB limit)" option keeps each file under Amazon's 200 MB web upload limit. You send each file yourself. | Takes files up to 500 MB and splits big ones into parts small enough for email, each with its own cover, named (1 of 3) and so on. Every part is sent for you. |
| Page sizes | Profiles for most Kindles ever made, plus Kobo, reMarkable and other e-readers | 10 Kindle profiles, from the 6-inch Kindle to the 11-inch Scribe. Kindles only. |
| Reading direction | Manga mode for right to left, or left to right | Right to left by default, left to right per upload in the web app |
| Color | Grayscale or color, with a fix for the rainbow effect on Kaleido 3 color screens | Color kept on the Colorsoft and Scribe Colorsoft, grayscale on other Kindles |
| Settings | Many, each explained in a tooltip | Kindle model, reading direction, a contrast boost and compression |
| Webtoons | Webtoon mode cuts long strips into pages | Not cut. Works when the chapter is already in page-height images. |
| Your files | Stay on your computer | Uploaded, converted on our server and deleted within 24 hours of sending |
| Open source | Yes (ISC license) | No |
When KCC is the better pick
- You want control over each page. KCC lets you choose how margins are cropped, whether double-page spreads are split, rotated or both, whether small images are upscaled, and much more. MangaSendr makes those choices for you.
- You read on a Kobo, a reMarkable or KOReader. KCC has profiles for them, makes KEPUB, CBZ and PDF files, and can remove the rainbow effect on Kaleido 3 color screens. MangaSendr only emails Kindles, and its downloads use one 6-inch Kindle page size.
- Your files are RAR-based CBRs or 7z archives. KCC opens them with 7-Zip installed. MangaSendr only reads CBR files that are ZIP archives inside, so a RAR one has to be extracted and zipped again first.
- You read webtoons. KCC's webtoon mode cuts long vertical strips into pages. MangaSendr doesn't.
- You want nothing to leave your computer. KCC converts on your machine. MangaSendr uploads the file to convert and send it, then deletes it within 24 hours of sending.
- You don't want to pay. KCC is free. With Amazon's Send to Kindle website, which takes files up to 200 MB, it covers the whole route at no cost.
When MangaSendr fits
- You don't want to install anything. The web app runs in any browser, so it works from a phone, a tablet or a computer you can't install software on.
- You'd rather not use a cable. The book is emailed to your Kindle and shows up in its library. This matters more on a Mac: KCC's README notes that 2022 and newer Kindles can need Amazon's USB File Transfer app, or a similar tool, to connect to macOS.
- You send a whole series. Pick up to 50 files at once, up to 500 MB each. They're sent one after another, in order, and named so the series sorts correctly on your Kindle.
- Your volumes are big. Anything too large for Amazon's 50 MB email limit is split into parts, each with its own cover, and every part is sent.
- You keep adding files to one folder. The optional Mac and Windows app checks a folder about once an hour and sends new CBZ, ZIP, EPUB and PDF files to your Kindle. After your free delivery, this needs the license.
- You don't want to learn settings. Pick your Kindle model once. Pages are trimmed, sized for that screen and set to turn right to left.
Using both
You don't have to pick one. A split that works: KCC for the files that need its settings, such as a webtoon, a RAR archive or anything for a Kobo, and MangaSendr for getting everyday CBZ volumes onto a Kindle from wherever you are.
If KCC already made a good EPUB for your Kindle, you don't need MangaSendr to convert it again. Amazon's Send to Kindle website takes it as it is, up to 200 MB.
For a quick one-off, MangaSendr's free converter turns a CBZ, ZIP or image file of up to 200 MB into an EPUB in your browser, 3 a day, with no account. Its pages use one standard 6-inch Kindle size.
Questions
Does MangaSendr use KCC?
No. MangaSendr has its own converter. For the newest Kindles it uses the same page sizes as KCC's profiles: 1272 x 1696 for the 7-inch Paperwhite and Colorsoft, and 1986 x 2648 for the 11-inch Scribe and Scribe Colorsoft. We're grateful to the KCC project for publishing them.
Can KCC send files to my Kindle?
No. KCC saves the converted file next to your original, and its README recommends copying it to the Kindle's documents folder over USB. You can also upload KCC's EPUB to Amazon's Send to Kindle website, which takes files up to 200 MB. KCC has an output option that keeps files under that size.
Is KCC still maintained?
Yes. Version 12.0.0 was released on September 26, 2026. It has profiles for current Kindles, including the Colorsoft, the Scribe 3 and the Scribe Colorsoft.
Which one makes better pages?
Both trim borders and size pages for your Kindle's screen. KCC gives you many more ways to tune the result, including upscaling, darker blacks and spread handling, so a patient KCC user can get exactly the page they want. MangaSendr aims for a good page with no tuning at all.
Does MangaSendr work with a Kobo?
It emails Kindles only. You can download a converted EPUB or CBZ for a Kobo, but the pages are sized for a 6-inch Kindle screen. For a Kobo, KCC with a Kobo profile and KEPUB output is the better fit.
What does MangaSendr cost?
Your first volume is free and you don't need a card. After your free volume, the license covers multi-file sending, splitting, automation and sending from any device, with delivery included. It's $29, paid once, with a 14-day money-back guarantee, or $4.99 a month. Pricing has the details.
Sources
Each source was checked on .
- KCC README: features, input and output formats, device profiles, FAQ: github.com/ciromattia/kcc
- KCC releases: version 12.0.0, released September 26, 2026: github.com/ciromattia/kcc/releases
- KCC source: output options, including EPUB (200MB limit): github.com/ciromattia/kcc/blob/master/kindlecomicconverter/KCC_gui.py
- Amazon: Learn How to Use Your Send to Kindle Email Address (25 attachments, 50 MB per email): www.amazon.com/gp/help/customer/display.html?nodeId=G7NECT4B4ZWHQ8WV
- Amazon: Learn About Sending Documents to Your Kindle Library (200 MB on the web, supported files): www.amazon.com/gp/help/customer/display.html?nodeId=G5WYD9SAF7PGXRNA
More comparisons
- All the tools in one table: Send to Kindle, KCC, Calibre and MangaSendr side by side.
- MangaSendr and Send to Kindle
- MangaSendr and Calibre
- How MangaSendr works, from your file to your Kindle library.
Send one volume and compare for yourself
You don't need a card, and there's nothing to install. After your free volume it's $29 once, not per volume, and it doesn't renew.