How to convert a folder of JPEGs to a manga EPUB

Maybe you scanned volumes you own, or an old backup came out as loose images. Instead of a neat .cbz file, you have a folder called Volume_01 containing 200 files named 001.jpg, 002.png, etc.

If you drag this folder directly onto your Kindle, nothing will happen. A Kobo won't treat it as a book either.

To read them on a Kindle, the images have to go into an ebook file (an EPUB). Here are two ways to do it.

Convert it now: zip the folder and drop it into the free images to EPUB converter for a Kindle-ready file in your browser. No account needed.

Doing it yourself with KCC

1. Open KCC (Kindle Comic Converter).
2. Drag the folder in (KCC also takes a ZIP or CBZ of it). Select your target device (e.g., Paperwhite) and turn on manga mode for right-to-left pages.
3. Choose EPUB as the output format and click Convert.
4. If you want to change the title, author or cover, open the .epub in Calibre and edit the metadata.
5. Send the EPUB with Send to Kindle (email, app or website). A Kindle can't open an EPUB copied over USB.

The biggest risk, whichever way you do it: If the images were named poorly (page1.jpg, page2.jpg... page10.jpg), alphabetical sorting will put page10.jpg before page2.jpg, and you end up with a book that is out of order. Rename the files with zero-padded numbers (001.jpg, 002.jpg ... 010.jpg) before you convert or zip them.

Uploading the ZIP to MangaSendr

MangaSendr takes over the convert and send steps. The zipping is still yours to do.

MangaSendr takes files, not folders, so loose images need to go into a ZIP first:

1. Select all the images in the folder.
2. Right-click and choose Compress (macOS) or Send to > Compressed (zipped) folder (Windows).
3. Name the ZIP after the series and volume, for example Volume_01.zip. The file name becomes the book's title on your Kindle.
4. Upload the ZIP at mangasendr.com from any browser, including the one on your phone.

Watched folders in the desktop app don't pick up loose image folders either. Zip the images first, and a ZIP or CBZ you put into a watched folder gets converted and emailed to your Kindle. The app checks those folders about once an hour while it's running.

Here is what happens to the ZIP once it's uploaded:

1. Page order: Pages are ordered by file name, so zero-padded names keep everything in sequence.
2. Image optimization: Plain white margins are trimmed, and each page is resized for the Kindle model you picked at setup.
3. Contrast: On black-and-white Kindles, pages get a contrast boost so faded ink reads darker on e-ink. It's the Enhance Contrast setting, on by default.
4. Cover and title: The first page becomes the cover and the title comes from the file name. Web uploads don't look anything up online, so name the ZIP the way you want it to appear.
5. EPUB Packaging & Delivery: The pages are packaged into a fixed-layout EPUB with right-to-left page order and emailed to your Kindle. Most files land within a few minutes.

Your first delivery is free. Pricing covers what's included after that.

Quick convert: For a single chapter, try the free EPUB converter. Upload a CBZ, a ZIP of images or a single image and download a Kindle-ready EPUB. No account needed.