CBZ conversion is generating much bigger file sizes than originals

[aur0n]

I'm trying to use this wonderful tool to just crop white spaces in my CBZ comic books. In the settings, I only check the "Color mode" to not lose colors in the process and convert to CBZ again.

The problem is that the generated file is much bigger than the original.
For example, with a 18.7Mb comic book (mostly black and white pages) I get in result a 56.8Mb file. I expected less or almost same size, since it's supposed to just crop white spaces.

Is there any way to fix this?

PS: I'm using the Windows version.

[Joshuajrodrigues]

saaammmeee

[axu2]

I bet it's because your source images are png and you are converting to jpg. a good idea would be to match the output format to the input. Converting from lossless png to lossy jpg for manga can make things way bigger. Jpg to PNG too can make it larger.

But png is pretty glitchy in mobi: #533

Alternatively use the mozJpeg option